Lightest DECT wireless headset on the market. Digital encryption: 64 bit | Choice of three comfortable, customizable wearing styles. Audio performance : PC plus desk phone Wideband: up to 6,800 Hz | Hot swappable battery for unlimited talk time (Additional battery sold separately) | Elegant magnetic headset docking | SoundGuard DIGITAL: protects against sound levels above 118 dBA | 3 way connectivity lets you easily switch and mix audio between desk phone, PC and mobile phones | Call answer/end, vol+/ , mute and flash | Battery meter conveniently displays headset battery life remaining in PC icon tray | Convertible (over the ear, behind the head, over the head), over the ear, and over the head (monaural and binaural) designs available | Elegant magnetic headset docking | Hot swappable battery for unlimited talk time (Additional battery sold separately)