Using Bluetooth 5.0 chip design, stronger compatibility and stability. Upgrade the NFC function, the mobile phone can be connected with . Bluetooth receiving (RX), Bluetooth transmitting (TX), FM transmitting three-in-one design. Equipped with high-definition LED digital display, working status and Bluetooth mode are clearly visible. Built-in digital to analog chip, support digital optical fiber, coaxial, AUX, RCA interface. Cool breathing light, red/blue 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 to 108. Support 5~8 meters infrared remote control, all kinds of functions are readily available. The product connection is simple, without any cumbersome driving and downloading APP. Product name: NFC Multifunction Bluetooth Adapter Product model: M6 Bluetooth version: Bluetooth V5.0 Support protocol: RX: A2DP AVRC TX: A2DP Working frequency band: 2.402GHz -2.480GHz Sensitivity: -85dBm less than 0.1%BER Signal to noise ratio: greater or equal to 90dB Screen size: 36x8MM Working current: less than 40mA Built-in battery: 3.7V/500mAh Charging current: about 400mA Charging time: about 2 hours Life time: RX about 10H, TX about 8H Bluetooth distance: less than or equal to 10M (open place) Charging : Micro-USB 5V/0.5A Interface type: Input: 3.5mm AUX RCA Optical Coaxial USB TF interface; Output: 3.5mm AUX RCA Support format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC//DTS/MIDI/G726/MTY Compatible devices: Android, IOS system mobile phones and PAD, wired speakers, power amplifiers, and Bluetooth speakers or headphones that support A2DP/protocol are connected foruse. Colour: Black Material: ABS Package Contents: 1 * Bluetooth adapter 1 * 3.5MM cable 1 * 3.5mm-RCA cable 1 * Micro-USB cable 1 * Remote Control 1 * English manual Only the above package content, other products are not included. Note: Light 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.