1. Item Type: USB Bluetooth Adapter; Material: ABS; Usage: Bluetooth Adapter; Output Interface: 3.5mm stereo, RCA left and right channel; Function: U disk, hands-free call, NFC connection, Bluetooth connection with 5.0; Frequency range: 2400-2483.5MHz; Output power: 28mW; Signal-to-noise ratio: ≥90dB; Forward transmission distance: approx. 10m / 32.8ft 2. Bluetooth 5.3 audio receiver adapter supports U disk, hands-free, NFC connection. Supports USB removable storage device, can play music without network. 3. NFC Bluetooth receiver turns on automatically when connected to power, making it ideal for use in cars or other vehicles. 10m / 32.8ft long-distance transmission, built-in antenna, reduces signal interference. 4. The Bluetooth 5.3 audio receiver adapter can be connected to two devices at the same time, allowing you to switch between two mobile phones, listen to songs and watch movies at the same time. 5. The Bluetooth receiver supports the connection of a 3.5mm audio port and 2 RCA audio ports at the same time. Ordinary speakers connected to the 3.5mm audio port without Bluetooth function can also be played wirelessly. 6. The Bluetooth audio adapter can answer, redial, hang up or reject calls with a simple button. Supports voice prompts from existing navigation apps to ensure safe driving without looking down. 7. 1 x USB Bluetooth adapter; 1 x Type-C charging cable; 1 x 3.5mm audio cable; 1 x RCA audio cable; 1 x English manual