Good: Mono to Stereo capabilities Extendable microphone boom Bad: Poor microphone quality Lacking stereo audio quality In-ear discomfort on long usage Rating : 5.8 / 10

Tune out the world, tune in full-spectrum stereo music and conveniently switch to calls on your music-enabled phone. Innovative stereo ear buds seal out noise and seal in sound for better listening, while AudioIQ technology digitally enhanced sound improves call quality on both sides of the call. The sliding boom gets you closer to the microphone, so you are heard better than ever. Convenient one-touch buttons let you control calls and music from your headset. At only 15 grams, it’s lightweight, comfortable and discreet. On the train, on the road, on the move— the Plantronics Voyager 855 Bluetooth headset the perfect convertible for traveling life’s highway.