Intelligent, versatile, and elegant: the Nokia Bluetooth Headset BH-900 is an ideal handsfree solution for those who demand quality, style, and clarity. With the latest technology, including digital signal processing (DSP) and a sliding boom microphone, this headset delivers superior performance. Classic style with Bluetooth wireless technology, available in dark grey with chrome-colored boom Unique sliding boom lets you adjust for the best audio to microphone performance Initiate Push to talk calls from the headset DSP with noise reduction and echo cancellation enables high audio quality—even in noisy environments Elastic earhook fits comfortably over either ear Individual buttons for: answer/end, volume up/down/select, and power on/off Other accessible call-features: hold, mute, voice-dialing activation, and redialing Up to 8 hours of talk time and up to 180 hours standby Type BH-900 Weight 18 g Dimensions 70.2 (/100mm if Boom open) x 22.5 x 20 mm Interfaces Bluetooth 2.0 specification, Handsfree (HFP) Profile 1.5 and Headset (HSP) Profile 1.1, LCIF 1.0 Talk time Up to 8 hours Standby time Up to 180 hours Operating temperature – 15C up to +55C Battery 160 mAh Lithium-Polymer Compatible WithAll Bluetooth enabled headsets