Adopt Bluetooth 5.0 chip design, which has stronger compatibility and stability.2 in1 design of Bluetooth receiving (RX) and Bluetooth transmitting (TX), toggle switch for quick switching.Equipped with a high-definition LED digital display screen, the working status and Bluetooth mode are clearly visible.Built-in digital-to-analog chip, supports six signal interfaces of digital optical fiber, coaxial, AUX, , U disk, and TF card.Upgrade the NFC function, and the mobile phone can be connected with .Bluetooth version: Bluetooth V5.0Supported protocols: RX: A2DP AVRC TX: A2DPWorking frequency band: 2.402GHz -2.480GHzPower level: Power level 2 (Class II)Sensitivity: -85dBm Less than 0.1%BERSignal-to-noise ratio: 90dBDistortion: 0.1%Interface Type:Input: 3.5mm AUX++optical (Optical)+coaxial (Coaxial)+USB+TF interfaceOutput: 3.5mm AUX+Fiber parameters: support fiber input, 16M, sampling rate 96kHzSupported formats: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC//DTS/MIDI/G726/MTYScreen size: 32 x 14.5 x 7MMWorking current: Less than 40mABuilt-in battery: 3.7V/500mAh 1.85WhCharging current: about 500mACharging time: about 1.5 hoursBattery life: RX about 10H, TX about 8HBluetooth distance: 10M-15M (open place)Charging : Type-C 5V-0.5ACompatible devices: Android, IOS system mobile phones and PADs, active speakers, power amplifiers, and Bluetooth speakers or headphones that support A2DP/protocol.Product size: 92 x 65 x 20mmType: NFC Bluetooth AdapterTransmission rate: 100 (Mbps)Bluetooth standard: 5.0Working frequency: 2.4 (MHz)color:BlackMaterial:PCPackage Contents:1 x Host1 x Type-C Charging Cable1 x 3.5mm Audio Cable1 x Red AndWhite Lotus Wire1 x IR Remote Control1 x English ManualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.