:. . VoiceControl™ to Answer, Reject, & Control Headset Volume Integrated Busy Light to Act as a "Do Not Disturb" for Colleagues Bluetooth™ version 5.0 Simultaneous Connectivity to 5 Devices Headband with Ear Cushion & Padded Headband 13 Hours of Talk Time & 52 Hours of Standby with a 90 min Charge Time Up to 490' of Range Noise-Canceling Microphone Dual Microphone - ECM Uni-Directional & Analog MEMS System DECT Security Level C Supports NFC Pairing Connects To:. . .table_custom { border:1px #CCC solid; width: 755px; font-size:12px;} .table_custom td { border: 1px #CCC solid; padding: 5px 0 5px 6px;} .table_custom tr { border:1px #CCC solid; }.table_custom_heading {background-color: #CCC; padding: 9px 5px; font-size: 15px;} Specifications: Speaker Size 28 x 3.9mm Speaker Max Output Power < 118 dBSPL(A) Speaker Frequency Range 40Hz-16kHz S