Plantronics BackBeat 903, Stereo Bluetooth Headphones with Mic, Bulk Packaging Streams music and calls from A2DP-enabled smartphones and Bluetooth MP3 players Dual-mic AudioIQ2 technology for clear, natural-sounding calls Rich stereo sound and bass boost from 14-millimeter speakers Up to seven hours of talk time and seven days of standby Backed by a one-year limited warranty