Wireless Bluetooth® Headset with Noise Canceling Microphone Get ready for a professional quality experience. You'll be able to answer calls with any Bluetooth® device like your smartphone or laptop with this comfortable, lightweight, high-quality headset. You'll have up to 21 hours of talk time on a single charge, and you will really appreciate the crystal clear sound and voice quality. The noise canceling microphone screens out the noise around you so you will be heard as well as you can hear. Wideband audio for exceptional sound quality. Volume and mute controls Advanced hearing protection cuts off sudden loud volumes Bluetooth ® Version: V3.0 backward compatible Advanced Multipoints Profile: Headset: 1.1 Hands-free: 1.5 A2DP Microphone with noise cancellation Crystal clear sound and voice (DSP) Distance: up to 33' (10m) Talk time: 21 hours from 300mAh battery Stand by time: 500 hours Working environment: 32° to 104° F (0° to +40° C); up to 95% relative humidity non-condensing. Visual indicators: LED indicates call status, pairing status, and others. Beep: indicates volume level, microphone mute, and others. Sound: Mic Noise canceling, sixth generation echo cancellation, tone control Charging: Z?M Maestro BT™ charges when docked in base.