Key Features: Connect seamlessly to any desk phone via RJ09, e.g. Avaya, Unify - pair up to 4 headsets to one base for easy call conferencing and training 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 Provides EHS or handset lifter (not included) support 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, RJ cable, user manual