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.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 AdapterBluetooth Version: V5.3+Battery Capacity: 300AmhWorking Range: 10m (without any obstacles)Charging Time: 1-2 hoursMusic Time: 8-10 hoursStandby Time: 90 daysSupport Protocol: A2DP/AVRCP/HFP/Audio Interface: 3.5mm AUX StereoSupport Mic: Yes, RX&FM Mode With Mic Handsfree Calling(TX Transmitter Mode is not supported Mic)Colour:WhiteMaterial:plasticPackage Contents:1 x Bluetooth Audio AdapterOnly 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.