Features:-The product has exquisite appearance.-Adopting Bluetooth 5.0 chip design, it has stronger compatibility and stability.-Bluetooth reception (RX), Bluetooth transmission (TX), FM transmission three-in-one design.-Equipped with high-definition LED digital display screen, working status and Bluetooth mode are clearly visible.-Built-in digital to analog chip, supports digital optical fiber, coaxial, AUX, RCA interface.-Upgraded NFC function, mobile phone can be connected with one touch.-Cool breathing light, red/blue dual color, soft and not dazzling.-Built-in 500mAh rechargeable lithium battery, long battery life -Support USB (U disk), TF card playback and transmission.-Support FM transmission, and the frequency can be adjusted from 87.5~108.-Support 5~8 meters infrared remote control, all kinds of functions are available.-Built-in high-definition microphone, support wireless listening, hands-free calls, navigation.-The product is easy to connect, without any driver or APP download;Packing list: 1*Bluetooth adapter host + 1*Micro USB charging cable + 1*3.5mm audio + 1*red and white RCA lotus cable + 1*English manual + 1*packaging boxWorking frequency band: 2.402GHz-2.480GHzPower level: Class IISensitivity: -85dBm<0.1% bit error rateBluetooth version: Bluetooth V5.0Supported protocol: Receiving: A2DP AVRC Sending: A2DPSignal-to-noise ratio: 90 decibelsDistortion: 0.1%Interface type: Input: 3.5mm AUX+RCA+Optical+Coaxial+USB+TF interface; Output: 3.5mm AUX+RCAOptical fiber parameters: support optical fiber input, 16M, sampling rate 99kHzSupported formats: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTYScreen size: 36*8mmWorking current: <40mABuilt-in battery: 3.7V/500mAhCharging current: about 400mACharging time: about 2 hoursBattery life: RX about 10H, TX about 8HBluetooth distance: 10M (open space)Charging method: Micro USB 5V/0.5ACompatible devices: Android, IOS system mobile phones and PADs, active speakers, amplifiers and Bluetooth speakers or headphones that support A2DP/protocol for connection and use