Jabra Evolve2 65, Link380c MS Ste Sta BeJabra Evolve2 65 USB-A UC Mono - Black. Product type: Headset. Connectivity technology: Wireless, Bluetooth. Recommended use: Office/Call center. Headset frequency: 20 - 20000 Hz. Wireless range: 98.4 ft. Cable length: 3.9 ft. Weight: 3.50 oz. Product colour: BlackPerformance. Product type: Headset. Headband. Recommended use: Office/Call center. Product colour: BlackHeadset type. Operating keysVolume +, Volume control. Button. Cable length: 3.9 ft. Detachable LED indicators. A Safetone Gr 616 Music playback. Number of devices connected simultaneously (maximum). 2 Auto-connect. Country of origin. ChinaCertificationUCPorts & interfaces. Connectivity technology. Wireless USB connectivityUSB connector type USB--ABluetoothYBluetooth profileAVRCPBluetooth version 5.0 Wireless range30 mHeadphones on-ear coupling. Maximum input power30 mWAcoustic systemHeadphone frequency20 - 20000 HzHeadphone sensitivity117 dBDriver Driver unit4 cmNoise reductionYBoom microphoneMicrophone frequency100 - 8000 HzMicrophone sensitivity-26 dBDetachable microphoneYMEMS (Micro Electro Mechanical System) microphone Battery operated. Battery typeYBuilt-in battery. Battery technologyLithium-ion (Li-ion)Battery life (max)37 hContinuous audio playback time24 hTalk time24 hBattery charge indicator1.5 hFast time15 min. System requirementsWindows operation