1It has two modes (TX and RX), it can Bluetooth support almost all audio devices in the family, such as TV, PC, old home stereo or speakers. Enjoy highquality wireless audio. 2In TX mode, there are up to 8 Bluetooth devices around the device displayed on the screen, and you can freely choose no more than 2 connections. It is more convenient and will not be mistakenly connected. 3Using aptX function to ensure a better listening experience than CD and aptX low latency to substantially eliminate audiovisual delay, it is an ideal choice for watching TV/movies. 4Supports 3.5mm AUX and RCA audio cables, meeting all your connection needs, compatible with 99% of the TV and audio systems on the market, and the car volume adjustment function can be used for many devices. 5USB charging, builtin 500mAh battery, it can be fully charged within 3 hours, in TX mode allows more than 10 hours, in RX mode, the use time is 13 hours, you can also use it while charging. Item Type: Bluetooth Receiver Material: ABS Color: As shown in the picture Bluetooth Version: Bluetooth V5.0 Built-In Battery: 400MAH Audio Performance: SBC, apt-X, apt-X LL, AAC (RX), FS (TX) and other CODEC Bluetooth Distance: 10m / 32.8ft Charging Method: Micro USB 5V/0.5A Charging Current: 5V DC 500MA Endurance: RX12H, TX12H How to Use 1. Turn on the switch. 2. Click the "M" button to switch to RX MODE. 3. The display goes from "connected" to "paired" state, and the device enters the Bluetooth pairing connection. 4. Insert 3.5mm audio cables (device and audio device) respectively. 5. Turn on the Bluetooth function of the mobile phone and select "B3". 6. After success, the Bluetooth pairing is displayed successfully, and the music can be played. 1 x Receiver 1 x Audio Cable 1 x Charging Cable 1 x Instruction Manual