1. Using Bluetooth 5.0 chip; 2. Support Bluetooth receiver (RX) and Bluetooth transmitter (TX), FM transmitter, TF card playback, function 4 in 1; 3. TF card can be played in receiving, transmitting and FM modes, and it supports mp3/flac/wav/wam/ape and other formats; 4. Built-in 300 mAh polymer battery, listening to music continuously for about 6 hours; 5. Multi-function buttons, support switch machine/play/pause/up and down song/volume up/down/sound source switching/frequency adjustment 1. High-definition LED digital display, all working conditions are clear at a glance 2. Cars without AUX interface also support FM transmission connection, and the frequency can be adjusted at will from FM 87.5-108MHZ, universal, stable signal and no noise 3. Bluetooth transmission distance is 10 meters 4. Built-in high-quality decoding chip, high-definition stereo sound quality 5. upgrade: launch can be used for Apple AirPods headset Product model: Bluetooth 5.0 receiver Voltage: 5V Features: 300mah built-in battery colour:Black Material:Plastic + electrical components size:55 x 21 x 15mm Package Contents: 1 x Bluetooth 5.0 Receiver 1 x 0.5m charging cable 1 x 1m 3.5mm audio cable 1 x English manual Only the above package content, other products are not included. Note: Light shooting 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.