GN Netcom T5330M Wireless Headset Digital Signal Processing (DSP) enchances the incoming voice and removes impurities from the audio signalAcoustic shock protection with PeakStop technology Ergonomic design with adjustable earhook for all day comfort Up to 4 hours talk time Compliant with most Bluetooth devices up to 33'Answer/end calls remotely with optional GN-1000 remote handset lifter (not included)Includes charging base