Cobra Deluxe Over-the-Head Bluetooth Headset with Boom Mic and T5 Sonance Noise Cancellation Technology - Bluetooth Headset - Retail Packaging - Black T5 Sonance Technology electronically filters noise and simultaneously amplifies voice for unparalleled sound quality, even in the nosiest of situations. Talk time of 8 hours, a standby time of 250 hours, and a 32 foot maximum operating distance. Meets and exceeds hands free device regulations for hands free laws. Easy volume control provides other functions such as placing calls on hold, transferring calls, and 3-way conference calls. Package contains USB charging cable, home charger, vehicle charger, extra ear cover, 2 extra microphone covers, manual, and a 1-year warranty.