Bluedio DF33T Bluetooth Stereo Headset for Mobile Phones - Retail Packaging - Black 1.The perfect combination Bluedio original composite drive units Bluetooth 4.0 the Latest Achievement of CSR. 2.Support NFC (Near Field Communication)&Double MIC Noise Reduction and Smart touch design. 3.Support audio suppression solution, it can afford consumers unique feeling of stereo music effect, let you immerse yourself in your own music world. 4.Support Multipoint Pairing and Compact Voice Command 5.Bluetooth 4.0 low Energy technology. Bluedio DF33T can achieve more than 400 hours of Standby time, 5 hours Talk time or Music playtime.