VicTsing Multipoint Noise Canceling Bluetooth Headset - Deep Grey Superior Noise Cancellation technology (crystal clear conversation) Talking/Standby time: up to 8 hours/Up to 200 hours Over-the-head design with booming MIC; Work with most of Bluetooth enabled phones Every VicTsing product includes a 45 days money-back and 12-month, worry-free Guarantee!