Poly Voyager 5200 Mono Bluetooth Headset System - 1-Way Base - Talk time/Stand by: Up to 7 hrs, up to 9 days standby time - Audio profiles: Six layers of WindSmart technology, PC wideband and mobile wideband: up to 6,800Hz; echo cancellation, proprietary DSP, A2DP - Speaker size: 13.6mm - Range communication: 100Hz - 6.8kHz - Range music/media: 100Hz - 20kHz - Digital MEMS omni-directional 4 mic array, multi-mic noise cancelling - 212722-08 - 12 Months Limited Warranty