Long 40+ hours of playtime with Bluetooth multipoint for mobile/PC/Mac, or plug-in to your PC or Mac directly with included cable. Multipoint technology allows you to connect to any 2 devices simultaneously and remember up to 10 devices. C3 Calling uses dual microphones for crystal clear phone calls Rotating boom microphone includes red LED light as a quick mute indicator Easy multi-functional controls for volume, tracks, play/pause, and answering calls Choose between 2 EQ settings: Work or Music mode