Today, Motorola (MOT) is unveiling its $100 Motopure H15 Universal Bluetooth Headset. It’s available from Verizon’s (VZ) stores and Web site, and I’ve been testing it.

While focusing on the new Motopure H15, I also took another look at two noise-canceling headsets we reviewed in May — the $130 Jawbone from Aliph Inc. and the $120 Plantronics (PLT) Discovery 925. I made calls on the three headsets while standing beside a construction crew’s loud generator in busy downtown Washington, D.C., and, in a separate test, running my hairdryer on high in the background.

In both of these loud scenarios, the results favored the Motopure over the Jawbone and Plantronics Discovery. Of the three, the Plantronics headset allowed the most background noise through and made it difficult for people to hear my voice. The Jawbone was much better than the Plantronics headset, but not as good as the Motopure, which dimmed loud background noise to a faint hum and seemed to amp up the volume of my own voice. I called various people and even left myself voicemails so I could hear the differences.

More Microphones

The Motopure H15 uses two microphones, while the Jawbone uses two microphones and one modified microphone that works as a voice-activity sensor. The Plantronics headset uses one microphone. Motorola says one of its microphones hears the user’s voice, the other picks up background noise and a technology called CrystalTalk works to filter that noise out.

In my Motopure testing, I saw at work technology that Motorola says is meant to automatically adjust the headset volume as noises increase or decrease in the background. And at no point during my tests with the headset did friends on the other end of the line notice any odd echoing or fading volume in my voice, as with some headsets.

Snug Fit

Unlike the Jawbone, which — as its name reflects — works by touching bones in the face to eliminate excess noise, the Motopure H15 never touches one’s face. In fact, Motorola cites this as an advantage over the Jawbone because it doesn’t need to touch a user’s face to work. Motorola’s headset fits using a loop of clear plastic that wraps snuggly around the ear, along with an in-ear piece, though it took me a little while to figure out which of its five earbuds fit best.

And unlike the Plantronics headset, which has a larger, triangular-shaped boom, the Motopure has a tiny boom that folds away when not in use. Users receive calls by simply folding the boom down, which instantly turns the headset on and connects to calls. When the boom is closed, the headset turns off to save battery. I liked the finality of closing the boom and knowing my headset was definitely off whenever I put it in my purse. And in its tucked-in position, the Motopure H15 is petite and portable.

But if you’re wearing this headset on your ear, opening and closing the boom is almost impossible. Motorola recommends using the boom as you would a clamshell cellphone: Answer calls by opening the boom before donning the earpiece and end calls by removing the earpiece and closing the boom.

Of course, many users will want to keep the device in their ear for an extended period, rather than fishing for it when a call comes in. For them, the awkwardness of the boom switch may be a problem. They can still keep the Motopure on with the boom opened, receiving and ending calls at any time by simply pressing the large Call button. In this state, the handset is in standby mode rather than off — the same as most Bluetooth headsets waiting for calls.

One Headset, Two Phones

A plus of the Motopure is its ability to simultaneously pair with two phones, such as a personal cellphone and a work smartphone. Incoming calls to both lines are represented by different colored lights on the headset. But as soon as a call with one phone begins, the Bluetooth link to the second phone is disconnected.

The Plantronics headset also has dual-phone pairing capability, but the Jawbone doesn’t.

According to Motorola, the Motopure’s battery lasts for about 4.5 hours of talk time. The Jawbone’s battery lasts four hours; the Plantronics headset, five hours. In standby, Motopure and the Plantronics Discovery last for about seven days; Jawbone lasts for eight. Pressing and holding the Motopure’s up and down volume buttons spurs an indicator light to glow red, yellow or green to represent battery strength.

I liked the Motopure’s sturdy charging stand, which doubles as a holder for the headset. Though this desktop charger isn’t available today from Verizon, it will be available later this month from other carriers and retailers in a $130 bundle with the headset.

More Colors Later

Today, the Motopure is available in a slate color, but it will be available in black later this month and other colors are tentatively planned for November. The Jawbone and the Plantronics headset are each available in three colors, and Jawbone will release blue and pink headsets later this month.

Overall, the Motopure H15’s noise cancellation worked the best out of these three headsets, and its tiny build and fold-up boom make it a helpful tool for consumers who want quiet conversations no matter where they are.

Write to Katherine Boehret at mossbergsolution@wsj.com

To make Bluetooth even easier to use in cars, most new luxury cars and some standard cars are sold with optional built-in Bluetooth speakerphone technology which doesn’t even require an earpiece. Some cars also come with built-in iPod integration, displaying song titles on the dashboard and controlling the iPod using buttons on the steering wheel, again to minimize distractions. One new built-in product, SYNC, the voice-activated system created by Ford Motor Co. and Microsoft Corp., lets users do both things hands-free: play music or make phone calls using simple voice commands.

The $120 Parrot PMK5800 uses voice recognition for a more hands-free experience.

This week, I tested two devices that bring Bluetooth technology to older cars in hopes of integrating hands-free phone calls and music with a car’s stereo system. I tried the $130 Venturi Mini from NextGen Venturi Ltd. (www.myventuri.com) and $120 Parrot PMK5800 from Parrot Inc. (www.parrot.com) on three cars made in 2000 and 2005.

Neither device offers a surefire solution; each is limited by your particular car and cellphone. But the Parrot sails ahead of the Venturi Mini by using voice activation for phone calls, something the Venturi Mini can’t do. Venturi’s version of “hands-free calling” requires initiating a call on the cellphone itself or by looking down at a tiny, grayscale screen and painstakingly scrolling through names of contacts. Furthermore, the Parrot worked after only a few steps, while the Venturi took much longer to set up and get going.

Both of these are one-piece black gadgets that plug into your car’s cigarette lighter and use FM transmitters to play on unused FM radio stations. Each has a tiny screen, though the Parrot screen is used solely to display the current station so as to match it with the radio. The idea is that after initially “pairing” a Bluetooth cellphone with one of these devices, the phone and device will automatically find each other whenever both are in the car and on, making calls easier and music a bit more hands-free.

The Parrot and Venturi Mini will only play music via Bluetooth using cellphones that have a technology called A2DP, which enables music streaming. More and more new cellphones have this technology, such as the Nokia 6555 that I used, but many — including Apple’s iPhone — don’t. Most people will play music by attaching an iPod or other portable music player to these devices using cables that come with them.

The $130 Venturi Mini doesn’t work with voice commands.

Neither the Venturi Mini nor the Parrot PMK5800 enable voice commands with music: songs streamed via Bluetooth are controlled using buttons on the devices, and music coming from a wired-attached player can only be operated using buttons on that player.

The Parrot isn’t as compact or as stylish as the Venturi Mini, but its best feature is unseen: built-in voice recognition software that guides you while using this device. If your cellphone has built-in voice-recognition software, which many do, you can plug in the Parrot and get started. Otherwise, contacts must be loaded on to the Parrot and assigned a voice tag. Large green and red buttons initiate or end phone calls, but speaking commands also works. A knob turns to different stations or can be pressed and turned for audible descriptions of menus. Three glowing Play/Pause, Skip Ahead and Skip Back buttons are easy to find without looking down so as to navigate through music.

While I was listening to music coming from one paired cellphone, my sister called me on another paired cellphone that I had forgotten I had in my purse. The music automatically paused, and the sound of a ringing phone came from the car speakers until I answered it by pressing the Parrot’s green button (speaking the word “phone” also works).

If voice tags are assigned to contacts in your phone, the name of the person calling can be announced over the speakers, like caller ID. Music automatically re-starts after a call ends.

I made calls on the Parrot by pressing its green button and speaking directions like “Call Allison Mobile” to call the correct number from my phone’s contact list. The voice recognition sounded a bit robotic, but almost always found the right number.

Most voice calls sounded rather clear to the people with whom I spoke, but in the car, calls suffered when stations were interrupted with static as I drove around the Washington, D.C., area. One major issue with relying on FM transmitters in major cities is the small number of unused radio stations. Static also affected streamed music, making it sound scratchy at times. Music playing from a cord-connected iPod had no trouble.

The same static problems arose with Bluetooth calls and music on the Venturi Mini. This device’s rectangular face has a scroll button in its center, which seems like it would be a useful addition. But this can’t be pressed down to select anything on the screen, which is maddening. Instead, selecting anything from the Venturi screen must be done using a separate button, as if it wasn’t even designed to be a hands-free device.

To set up the Mini, a paired phone’s contacts must be copied from the phone onto the device. Once these contacts are added, calls can be initiated through the device by finding the correct name on the screen using the scroll wheel and pressing more buttons to select that name and place the call. None of this involves voice recognition, and it’s all supposed to be done while you’re driving.

For all its faults, the Venturi does have a few features that the Parrot doesn’t, including the ability to display Bluetooth data — like the name or number of an incoming caller and a song title and artist — on your radio display if your car has this ability. But most older cars don’t allow this, and I couldn’t quickly figure out how it worked even while driving in a 2005 car. You can also charge devices through the Mini using a built-in USB port.

The position of a car’s cigarette lighter matters to the Venturi Mini and the Parrot. This plug is often positioned near the gear shift, and in my manual car, it would’ve been difficult to operate these gadgets while in fifth gear (I didn’t try). The location of this plug also determines how loud or soft your voice sound to callers. So as to not sound so far away during calls I tried to lean closer to the devices, but this isn’t safe while driving.

The Venturi Mini looks like a hip device, but without voice recognition software and a smart interface, it’s frustrating and dangerous to use. Parrot’s PMK5800 plugs in and works and its voice-recognition software makes it a true hands-free device that will improve the way you use Bluetooth in your car. Just look out for static, especially in big cities.

Edited by Walter S. Mossberg

Email mossbergsolution@wsj.com

It seems that this last attribute — the ability to make and receive calls on a cellphone — is overlooked and underestimated by many manufacturers. But believe it or not, there are plenty of people out there who simply want to use their cellphones for calls, period.

These individuals range from college students who frequently damage or lose their phones to wary, first-time buyers to senior citizens whose kids or grandchildren insist they use a cellphone. About a year ago, GreatCall Inc. introduced its Jitterbug cellphones, which were aimed squarely at the senior set with large keys, a free operator service and the phone’s own number prominently displayed on a sticker.

It seems that GreatCall was on to something. Verizon Wireless recently followed the company’s lead by introducing its straightforward, no frills Coupe, a cellphone that offers many of the helpful traits found on Jitterbug phones, like large screen fonts, but without a lot of extras. Verizon simultaneously unveiled two calling plans designed specifically for seniors, and was followed a month later by AT&T and its own monthly plan for those 65 and over. AT&T also has an uncomplicated phone of its own in the works for 2008.

This week I tested Verizon’s $40 (with a two-year contract) Coupe (www.verizonwireless.com) against GreatCall’s $147 Jitterbug Dial (www.jitterbug.com) to see how the two stacked up. I found the Jitterbug more comfortable to use for longer phone calls because of its cushiony earpiece, which blocks out external sound and helps the phone rest easier between your shoulder and ear during conversations. And Jitterbug’s mantra of simplicity will appeal to cellphone newcomers.

But for those who have been using cellphones and are familiar with the way they work, Jitterbug’s nonconformist features — like Yes and No buttons in place of Send and End and the use of a dial tone whenever the clamshell-shaped phone is opened — can come across as too basic, to the point that they’re confusing. One example: many standard cellphones redial the last number called when the Send button is pressed twice, but redialing on the Jitterbug requires navigating through five screens to redial the last number.

The Coupe is the smaller of the two and blends in with other cellphones. It includes a few of the extra functions found in normal mobile phones, like an alarm clock, calculator and the capability to send and receive text messages; perhaps most people who buy the Coupe won’t use it for texting, but it’s nice to have the built-in option. (The Jitterbug doesn’t have any of these features.) Right now, this cellphone only comes in shiny black with a blue border around its outside display screen. An included charging cradle adds a touch of convenience.

The Coupe also has some fun features that give it a more personal touch, including a choice of 24 ringtones and 10 wallpaper designs for the main screen’s background. After seeing low-grade camera lenses on nearly every digital device that I’ve picked up recently, the Coupe looked a little naked without one.

Three red buttons labeled I, C and E (for In Case of Emergency) are positioned just below the phone’s screen and can be assigned names and numbers to work as shortcuts to those most often called. A specially marked “911″ button on the phone’s keypad is designated specifically for emergencies, though this must be held down to use and, even then, asks if the caller definitely intended to call 911.

A speaker button is also clearly labeled on the Coupe’s keypad, and pronounced volume adjustment keys line the phone’s side. On-screen fonts appear larger than those found on regular cellphones.

Verizon’s well-known network is sure to be a draw for potential buyers, especially because any plan used with the Coupe includes free calls to other Verizon Wireless users. Though any of this carrier’s plans work with this basic phone, the Nationwide 65 Plus plan made its debut with the Coupe in hopes of appealing to those ages 65 and up. A single-line plan allows 200 anytime minutes and 500 night and weekend minutes for $30 monthly; the two-line plan offers roughly double the minutes (to be shared) for double the price. These plans aren’t exclusively usable with the Coupe.

GreatCall’s Jitterbug comes in two $147 models: the Dial, with a numeric keypad and the OneTouch, with just three large buttons labeled Operator, Tow and 911. I’ve tested both in the past, but this time around I looked at the Dial because it’s most comparable to Verizon’s Coupe.

The Jitterbug Dial phone comes in black or white, and its buttons and all of its on-screen lettering appear considerably larger than the Verizon Coupe’s. Its number keys glow bright white and are encircled by yellow borders, while the Coupe’s digital keypad is black with glowing blue numbers — colors that aren’t as distinctive. Unlike the Coupe, Jitterbug doesn’t come with a charging cradle, though GreatCall has plans for adding cradles in 2008.

A free operator service can be reached from Jitterbug phones by pressing “0.” This operator greets users by name, places calls on the user’s phone (saving you the trouble of dialing) and can add numbers to a phone’s contact list if a user doesn’t want to or can’t do this.

The Jitterbug can be pre-programmed with names and numbers; I ordered mine with five pre-programmed numbers, a luxury that nervous new cellphone owners might find worthwhile. Things get difficult when you try to enter your contacts. Even though each number key has three or four letters assigned to its key as on all phones, adding a contact involves using Jitterbug’s clumsy system of choosing one letter at a time from the screen. You’re better off using the free operator service for this.

Jitterbug phones let users store only 50 contact names and numbers, while Verizon’s Coupe will store 500. Many first-time cellphone owners will be content with 50, but, again, options are good.

The Jitterbug and Coupe each have small screens on their outer shells that display the time, date and phone numbers of incoming calls. But the Coupe displays its remaining battery power both on this outer screen and inside on its main screen, while the Jitterbug only flashes battery status on the screen if the battery reaches a certain low level, or if you navigate to a special “Phone Info” screen.

Behind the scenes, GreatCall’s Jitterbug phones run using networks set up by other carriers; I never had any trouble dialing out or receiving calls. A variety of calling plans can be used with Jitterbug phones ranging from $10 monthly for pay-as-you-go at 35 cents a minute to $80 monthly for 800 minutes. Add-on packages of minutes and sharing plans are also available.

If you’re familiar with cellphones, the Jitterbug will be a confusing step back for you, even though its free operator service and comfortable earpiece are pluses. Some people will prefer the Jitterbug’s larger fonts and number keys to the Verizon Coupe’s smaller, more stylish build. Still, the Coupe is a good option for people who have at least some familiarity with technology and cellphones. Each in its own way does a good job of sticking to the basic task of handling phone calls.

Edited by Walter S. Mossberg

Email mossbergsolution@wsj.com.