[Bluetooth Transmitter and Receiver 2-IN-1]This aux bluetooth adapter supports RX receiving mode, TX transmitting mode, TF card transmitting mode and TF card playing mode (TF card is not included). 4 playback modes can be adjusted at will, listening to music is no longer limited The aux to bluetooth adapter can provide Bluetooth functionality for audio devices such as amplifiers, home stereos, loudspeakers, headphones, or car speakers, so that you can enjoy wireless music streaming. [Upgraded Bluetooth 5.4]Adopts the latest Bluetooth 5.4 technology to a more stable and faster connection. The coverage range of the bluetooth aux adapter is 10m, the signal is not lagging to bring you a smooth listening experience, and support the automatic reconnection function. (Bluetooth receiving function: connect 1 mobile phone; Bluetooth transmitting function: connect 1 pair of Bluetooth headphones) [Hands-free Calling]The Bluetooth receiver with built-in microphone, when plugged into the car AUX interface, connected to the mobile phone Bluetooth, you can listen to songs and navigation and hands-free calls three in one, provide you with clear sound quality. Drive safely The Bluetooth transmitter weighs less than 30 grams. Ideal for road trips, camping or business trips. [HD Status Display]Built-in high-definition display, the bluetooth transmitter 3.5mm can display real-time working status. With 200mAh rechargeable battery, the airplane bluetooth adapter charging one hour can be used for 6-7 hours. Support PC, charging treasure, car USB and other charging methods, and can be used while charging, so you can reduce the attention to the battery power, enjoy the streaming time as you like. Material: Plastic Color: As shown Package Contents: 1 x Bluetooth Transmitter Receiver 1 x Audio Adapter (Random Color, No specification isaccepted) 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.