In addition to providing maximum comfort and sound performance, the M2500's "SoundGuide" earpiece is designed to fit in either ear. Meanwhile, a multifunction toggle simplifies the headset's functions by combining power, volume and mute into a single, easy-to-use control. An LED status indicator keeps tabs on battery life and power status, while a convenient call answer/end button on the M2500's boom makes it easy to accept and end calls. The device works up to 30 feet away from your mobile phone, so you can talk and walk freely even if your phone is inside your briefcase, pocket, or across the room from you. And with a weight of just 23 grams, you'll hardly know you're wearing anything on your ear!

In addition to five hours of talk time, the headset's NiMH rechargeable battery supports up to 120 hours of standby time so you'll always be ready to receive a call. The M2500 supports Bluetooth headset and hands-free profiles for universal compatibility with Bluetooth mobile phones, computers, PDAs and more.

NoiseBuster technology was first developed by leading "anti-noise" engineers in 1994, and since then it has only gotten better. The NBFX Headphones employ the latest and most advance noise canceling technology available in a headphone design that is both comfortable and versatile.

Background noise degrades the quality and clarity of music in two ways. First, it masks certain tones in the music, making the sound unbalanced. Second, in order to compensate for noise, people tend to over amplify the music, causing unnecessary distortion. As a result, you're only able to appreciate a small portion of the actual music you're tying to listen to. NoiseBuster solves both problems and therefore delivers the utmost in music clarity when used with portable audio devices.

NoiseBuster uses a microphone inside and outside the earcup that "listens" to offending noise coming into the ear. Using advanced electronics, the system takes the information from the microphone and uses it to create a noise wave that is identical to, but directly opposite of, the one coming into the ear. This "anti-noise" wave is output through a speaker, also located in the earcup. And when the offending noise wave and the anti-noise wave meet, the background noise is significantly reduced. Overall, the NBFX Headphones cancels an unheard of 18 dB of noise across a more extended frequency range, meaning that you hear to what you want to hear.

Included with these comfortable, durable, foldable headphones are a carry pouch, airline seat adapter and one AAA battery.

Features:
 

• Digital-ready stereo headphones, delivering high-impact stereo sound
• Comfortable, lightweight, and easy to adjust
• Foldable for portability and easy storage (travel pouch included)
• Airplane seat dual-prong adapter included
• Powered by one AAA battery (included)
• Audio play-through with or without noise reduction
• Frequency range: 20 - 20,000 Hz
• Noise cancellation range: 40 - 1,200 Hz, maximum 18 dB at 100-200 Hz

FreeSpeak also works with non-Bluetooth mobile phones using a versatile multi-adapter, a Bluetooth adapter that also functions as a charger and holder.The multi-adapter plugs directly into your non-Bluetooth phone to enable Bluetooth wireless connectivity. It also comes with a snap-on clip to hold the earpiece to your belt or purse when not in use.

Weighing less than an ounce, FreeSpeak is made of a soft, sound-absorbing elastomer material that reduces distortions, resulting in crisp sound quality. The earpiece and microphone boom fit behind either ear for a comfortable, secure fit. The earpiece also features the new Jabra MiniGel, an evolution of our patented EarGel. This soft, ergonomic gel tip channels sound directly into your ear for better reception. This improves your ability to hear conversations clearly even in noisy environments.

Bose's acoustic equalization techniques aim to deliver the rich nuances of your music--details that conventional headphones often lose. The TriPort headphone technology faithfully reproduces deep, full low notes without requiring the artificial bass-boost function found on many portable players.

Based on the results of decades of audio research and headphone acoustical study, Bose identified ways in which normal listener sound perception changes when people wear headphones. That led to the development of Bose's proprietary acoustic equalization techniques, which have fine-tuned the frequency response of the TriPort headphones for exceptional performance.

The headphones' soft ear cushions gently fit around your ear for comfortable listening. A thin, adjustable headband offers several head-size settings, and the earcups swivel for a better fit. The headphones include a generous, five-foot extension cable and a handy carrying pouch.