Features of the Voyager 855 are pretty basic. There's the typical answering, ending, and rejecting calls, as well as call mute, voice-dial support, and last-number redial. Because the Voyager 855 supports the AVRCP profile, you can also control your music via the headset's controls. Other features include a battery-life indicator and the ability to transfer calls from headset to the phone and vice versa.
We tested the Voyager 855 with the LG Trax. Pairing went very smoothly without any hiccups. Audio quality was simply stunning, thanks to Plantronics' Audio IQ technology. Callers could hear us without any problem and vice versa. However, there was still some amount of static and background noise in crowded situations, but that's nothing to worry about. What we also liked was that the headset alerted us to incoming calls during music playback, and we could switch out to the conversation and switch back to right where the music left off.
The Plantronics Voyager 855 has a rated talk time of 7 hours, a listening time of up to 6, and a rated standby time of 6.7 days.