Product parameters: 1. Power supply mode: USB 5V power supply 2. Bluetooth: Bluetooth 2.1 and EDR specification 3. Output method: USB port 3.5mm audio interface 4. Receiving distance: not less than 10m 5. Standard accessories: 3.5mm audio data cable 6. Product weight: 23g instruct: 1. Insert the Bluetooth adapter into the USB interface of the audio device with USB audio protocol 2. Turn on the power of the audio equipment, the blue LED light of the converter will flash 3. Turn on the bluetooth of the mobile phone, search for bluetooth devices and pair them compatibility: Supports all sound schemes This product does not need to be charged, and it can be powered on without connecting to the USB interface. Note: random delivery (color) Shipment Quantity: 1 piece Package Contents: Only the above package content, other products are not included. (Reminder: The size is measured manually, please allow 1-2cm measurement error) Random Color (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.