Key Features: Connect seamlessly to any desk phone, laptop or PC via USB cable from base, for use with 3CX, Unify, Mitel, Avaya soft clients - pair up to 4 headsets to one base for easy call conferencing and training Supports Skype-for-Business hook On/Off Multi-function button on ear for volume, answer calls or end calls Headset and battery status lights on base, also mic and receiver volume adjustment Optimised for VoIP and Unified Communications Big and soft Leatherette ear cushion Excellent Noise Cancelling Microphone Wideband audio for exceptional sound quality Technical Specification: DECT 30m indoor range 6 hours talk time 36 hours standby time Lithium Ion-polymer battery 300mAh typical What's in the box Headset, base, 2-pin power adaptor, USB-to-mini USB cable, user manual