Using Bluetooth 5.3 chip design, stronger compatibility and stability. Bluetooth Receiving (RX), Bluetooth Transmitting (TX), FM Transmitting 3 IN 1 design. Equipped with high-definition LED digital display, working status and Bluetooth mode are clearly visible. Built-in 300mAh rechargeable lithium battery, long battery life,which is convenient and worry-free. Support FM transmission, and the frequency can be adjusted from 87.5-107.9MHz.Quickly connect to the car through FM frequency modulation, which is more convenient and faster to use.<br><br>Built-in high-definition microphone, support wireless music listening, hands-free call, navigation.(Note:TX Transmitter Mode is not supported Microphone) Lossless sound quality CD-level enjoyment: high-resolution restoration of lossless sound quality, bringing CD-level music experience. Receiver Mode For: Car Kit/Wired Speaker/Home Speaker/Speaker Power amplifier/Headphone ... Transmitter Mode For: TV/PC/Projector/Power amplifier/TV Box /Bluetooth Headphone/Earphone/Bluetooth Speaker ... FM Transmitter Mode For Car Kit, Built-in Mic Support HD Handsfree Calling. Product Model: 3 IN 1 Wireless Audio Adapter Bluetooth Version: V5.3+ Battery Capacity: 300Amh Working Range: 10m (without any obstacles) Charging Time: 1-2 hours Music Time: 8-10 hours Standby Time: 90 days Support Protocol: A2DP/AVRCP/HFP/ Audio Interface: 3.5mm AUX Stereo Support Mic: Yes, RX&FM Mode With Mic Handsfree Calling (TX Transmitter Mode is not supported Mic) Colour:White Material:plastic<br><br>Package Contents: 1 x Bluetooth Audio Adapter<br><br>Only 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.