Ergonomically designed for drivers–converts from driver-safe headset to comfortable dual-ear stereo headphones; Removable earpiece plus 180deg boom microphone can be worn on left or right side; upward flip activates mute; Multiple microphones work to cancel up to 90% of in-cab noise for crisp, clean calls; Button-activated active noise cancellation tunes out ambient noise while listening to music; Memory foam headband & earcups constructed with breathable, oil-resistant material & premium stitching for all-day comfort & superior durability; Single charge provides up to 20 hours of talk & music playback time & about 500 hours of standby time; Freq resp: 10Hz-22kHz; Sensitivity: 18dB +/-2dB SPL/V; 500mAh rechargeable battery; Weight: 10oz; 1-year warranty; Includes detachable earpod, audio cable, micro USB cable & hard case;