Yealink CP900 Teams Edition. Device type: Universal, Product colour: Black, Grey, Maximum operating distance: 30 m. Sensitivity: 82 dB, Output power: 3 W, Frequency range: 115 - 16000 Hz. Microphone frequency: 115 - 7000 Hz, Microphone sensitivity: 59 dB. Connectivity technology: Wired & Wireless, Interface: USB/Bluetooth, Bluetooth profiles: A2DP, AVRCP. Power source type: Battery, Battery technology: Lithium Polymer (LiPo), Battery capacity: 2450 mAh