Feature:1. 2 in 1 Adapter: The appearance is exquisite. Using Bluetooth compatible 5.0 chip design, strong compatibility and stability. Bluetooth compatible receiver (RX), Bluetooth compatible transmitter (TX) 2 in 1 design, toggle switch to switch quickly.2. LED Digital Display: Equipped with HD LED digital display, working status and Bluetooth compatible mode are clearly visible. Built in digital to analog chip, supports 6 signal interfaces of digital optical fiber, coaxial, AUX, RCA, U disk, and memory card.3. NFC Function: Upgrade the NFC function, the mobile phone can connect with one button. Cool breathing light, red blue color, soft and not dazzling. Support Format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY.4. Rechargeable Lithium Battery: Built in 500mAh rechargeable lithium battery, long battery life. Support USB (U disk), memory card playback and transmission. Support 58m / 1626ft infrared remote control, all kinds of functions are readily available.5. Compatible Devices: For Android, for iOS system mobile phones and PAD, active speakers, power amplifiers and Bluetooth speakers or earphones that support A2DP protocol are connected for use. Built in HD microphone, support wireless music listening, hands free call, navigation.Specification:Item Type: Bluetooth Transmitter ReceiverMaterial: PlasticModel: M8Bluetooth Version: Bluetooth V5.0Support Protocol: RX: A2DP AVRC TX: A2DPWorking Frequency: 2.402GHz -2.480GHzPower Class: Class IISensitivity: -85dBm<0.1%BERSignal to Noise Ratio: 90dBDistortion: 0.1%Interface TypeInput: 3.5mm AUX+RCA+Optical+Coaxial+USB+Memory Card interfaceOutput: 3.5mm AUX+RCASupport Format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTYScreen Size: Approx. 32x14.5x7mm / 1.26x0.57x0.27inWorking Current: 40mABuilt in Battery: 500mAh lithium battery (included)Remote Control Battery: 1 x CR2025Charging Current: About 500mACharging Time: About 1.5 hoursLife Time: RX about 10H, TX about 8HBluetooth Distance: 10m-15m / 33ft- 49ft (open place)Charging Method: Type-C 5V-0.5ACompatible Devices: For Android, for iOS system mobile phones and PAD, active speakers, power amplifiers and Bluetooth speakers or earphones that support A2DP protocol are connected for use.Package List:1 x Bluetooth Compatible Adapter1 x Type C Charging Cable1 x 3.5mm AUX Cable1 x Red and White RCA Cable1 x English Manual1 x Remote Control