Item Features1. NFC Function. 2. Remote Photo Function. (Use the Device Control your phone to take a picture) 3. Bluetooth 5.1 4. BluetootH Reciever Transmitter 2 in 1. 5. Stereo Audio. 6. Collar clip design. Clip the Device on your collar to enjoy music when you sport, running... 7. 2.5mm/3.5mm Aux interface, with Input and output Function. Item ParameterProduct Name: receiver transmitter Type-C interface: charging Charging voltage: dc5 + 0.25V Function: receiver transmitter Material: ABS + PC Transmission distance: < 15m Battery: 200mAh HiFi class convenient decoding Bluetooth earphone let wired devices have Bluetooth function. Support connecting two mobile phones at the same time, and the two mobile phones can be switched arbitrarily. Bluetooth transmit profile (TX) Convert the wired device into Bluetooth signal and wirelessly transmit it to the Bluetooth device for output. Bluetooth receive profile (RX) Convert the wired device into Bluetooth signal and wirelessly transmit it to the Bluetooth device for output. Equipped with Qualcomm high-performance Bluetooth chip 15m long distance, stable and fast connection. SMART NFC ONE TOUCH PAIRING With NFC function, Bluetooth pairing can be carried out quickly just close to the mobile device. Eliminates the traditional tedious pairing process. PS: the paired device should support the NFC function at the same time,and ensure that the Bluetooth and NFC switches are turned on when using ONE CLICK CAMERA FUNCTION In Rx mode, turn on the camera and briefly press the take picture button to take pictures Easy to take professional images, automatic balance, hand shaking, scene shaking, picture shaking!