The Savi 8445 is ready for the modern office with an intuitive user interface on the universal base that can connect to almost any Savi headset. Features: - Monaural - With ear hook - Range of up to 55 m in typical office environments and up to 180 m line-of-sight - Noise cancelling microphone with Poly Acoustic Fence technology - Conference up to 4 headsets on one base - Designed to fulfil DECT Security Step C standards -- The highest level of security as defined by the DECT Forum - Unlimited talk and standby time - Fully charged within 3 hours - Call control on headset - Voice prompts and alerts