Jabra Evolve2 85, Link380a UC Stereo Black (28599-989-999) Connectivity - USB (via Jabra Link 380 Dongle) and Bluetooth Compatible - all leading UC Platforms Connect - Dual Bluetooth technology, two Bluetooth devices simultaneously Wireless range - 30m Microphone - 10-Mic technology for outstanding call performance Digital hybrid Active Noise Cancellation Powerful 40mm speaker delivers immersive audio Battery life - 37 hours Smart Sensor detects is in use allowing auto playing and pausing of audio and answering and muting calls Call management: Answer, Reject, volume +/-, mute