Product Features: 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. Mode 1: TX Transmitter Mode: The function of the Bluetooth Transmitter is to add a bluetooth function to devices without bluetooth function such as TV/computer, so that they can connect to bluetooth speakers/headphones. This is a Bluetooth transmitter buit with the newest technology , it wouldn't show in the Bluetooth devices in your phone,computer or TV and you only need to make the Bluetooth devices close to this Bluetooth transmitter then they will connect with each other automatically. Mode 2: RX Receiver Mode: The function of the Bluetooth Receiver is to add Bluetooth wireless function to the wired speaker/headphone, so that the Bluetooth-enabled device such as the mobile phone can be wirelessly connectedto the wired speaker/headphone through the adapter. Mode 3: FM Transmitter Mode:(87.5-107.9MHz) Quickly connect to the car through FM frequency modulation, which is more convenient and faster to use. (The FM function is only a connection function and does not support the FM radio function) Product : Product Model: 3 IN 1 Wireless Audio Adapter Bluetooth Version: V5.3+ Battery Capacity: 300Amh Working Range: 10m (without any obstacles) Material: plastic colour: White Package Contents: 1 x 3-in-1 Bluetooth 5.3 Wireless Audio Adapter 1 x 3.5mm AUX Audio Cable 1 x Type-C Charging Cable 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.