Monaural DECT headset for a desk phone and/or PC or notebook ActiveGard technology protects against acoustic shock and sudden sound surges HD voice quality for clear conversations Noise-cancelling microphone filters background noise Volume and mute controls on the headset For desk sharing and phone conferences Smart fast charge: Re-charge 50% of the battery in just 20 minutes for 4 hours of talk time Soft synthetic leather ear cushions Talk time: 8 hours (wideband mode), 12 hours (narrowband mode) Range: 180 m (line of sight), 55 m (office) Standby time: up to 100 hours Includes: AC adapter; USB cable; audio phone cable; name plate holder for headband; printed quick start guide; CD with user manual Optimised for Skype for Business