Up to 13 hours battery life Deskphone calls Incredible wireless range Works with the Link 400 Busy-day-proof Passive Noise Cancellation FIPS military-grade 256-bit encryption 3 wearing styles 52 Hours standby Microphone optimized for speech clarity with wideband audio Durable design for busy environments Compatible with the Engage 55 USB adaptor (Link 400) and Engage 65 base Up to 150 meters / 490 feet wireless range DECT Security certification and FIPS military-grade 256-bit encryption Lightweight for comfort all day Performance Suitable for use in country/location Australia, New Zealand, Singapore, United Kingdom, Hong Kong Hearing protection technologies Jabra BalancedVoice, Jabra PeakStop, Jabra Safetone 2.0, Sidetone Technology, Speech Normalization Number of simultaneously connected devices (max) 3 DECT connectable Yes Clear Voice technology Yes BeamForming Yes Control type Buttons Control unit type On-ear control unit Volume control Button Operating keys Answer/end call, Mute, V