Bluedio DF33T combines Bluetooth 4.0 HD Audio, Low Energy Technology, Bluedio Original Composite Drive Unit and latest NFC technology, creates an excellent Bluetooth stereo headset. Combination of many kinds of latest technology, Bluedio DF33T attracts more attention from its development, which destines to be the pride of Bluedio. The perfect combination of Bluedio original composite drive units and Bluetooth 4.0 Chip, the Latest Achievement of CSR. Support NFC (Near Field Communication) Bluedio R&D team combines with the latest NFC technology, and successfully applies in Bluedio newly products BluedioDF33T. NFC offering a simply touch solutions. With NFC you just need to use your mobile phone to touch once the headset, your phone will connect with the headset. Support aptX BluedioDF33T Bluetooth stereo headset uses the latest 4.0 Bluetooth chip，through its built-in lossless transmission technology audio suppression solution，maintaining the HD audio clear talk，it can afford consumers unique feeling of stereo music effect. And supports AAC、SBC unique music format. Support Multipoint Pairing and Compact Voice Command DF33T Technical Specification: Bluetooth Version: Bluetooth V4.0 Support Profiles: A2DP AVRCP HSP HFP Standby Time: around 400hrs Talk Time: around 5hrs Music Playtime: around 5hrs Battery: 100mA Li-Polymer rechargeable battery Frequency Range: 2.4GHz-2.48GHz Operational Temperature: -10 to 50°C Operating Distance: Up to 10m (free space) Accessories: Bluedio DF33T Bluetooth Headset 1pc USB Charging Cable 1pc Ear Cord 1pcs Ear Hook 3pcs User Manual 1pc