Another of Plantronics' latest Bluetooth hands-free kits, the Discovery 655 is a great device for those who are regularly on the road. It's similar to the 665 but offers increased battery life. The fact that it can be charged by using its extremely handy AAA battery adapter makes it the ultimate solution for the mobile professional.
The best thing about this unit is its charging capability. Plantronics has thought of everything. In the box users get a standard AC adapter, as well as a USB dongle for charging via a notebook or PC. However, the real gem is the included charging cradle that supports a AAA battery. It's brilliant for those who are regularly away from AC power as it allows a user to carry a small stockpile of batteries so that the unit can be charged anywhere.
When running while connected to this adapter, the unit can supply 10 hours of talktime, which is huge compared to the average of six or seven hours we typically see. Without the cradle, Plantronics quotes a talk time of only 3.5 hours and 80 hours of standby time.
In our tests, the 655 produced good audio quality, during incoming and outgoing calls. Callers reported the voice quality to be crisp and clear. While a little more volume on the incoming audio would be welcomed, it's satisfactory for most uses. As with the other models in this series, the controls and the interface are extremely basic. Almost everything is done using the main control button. This includes answering and ending calls, rejecting them and bouncing them between the phone and headset. The only other buttons are for controlling the volume.
The 655 doesn't have a compulsory ear clip (although one is included in the package). Instead, it's supported by a rubber clip as it slips into your ear canal. It weighs only 9g and is perfectly comfortable. Several ear pieces are provided, so users can tailor the fit to the shape of their ears.
The design of the 655 is slim and stylish, with an angular black and silver body that looks quite modern. There is also a small LED ring around the control button that changes colour to indicate whether the kit is paired or in pairing mode.