The go work headset features 45+ hours of bluetooth playtime with the ability to connect to any 2 devices simultaneously. Includes dual microphones for clear calling, a quick mute indicator, multi-functional buttons for controls, and the ability to choose between 2 eq settings: work or music mode. Headphone features long 45+ 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 headphone return policy: no refunds or exchanges allowed on open products.