Item Type: USB Bluetooth Adapter Material: ABS Use: Bluetooth Adapter Output Interface: 3.5mm Stereo, RCA Left and Right Channel Function: U Disk, Hands Free Call, NFC Connection Bluetooth Protocol: AVRCP, A2DP Bluetooth Version: 5.3 (compatible with 5.0) Frequency Range: 2400-2483.5MHz Output Power: 28mW Signal to Noise Ratio: 90dB Forward Transmission Distance: Approx. 10m/32.8ft1Multifunction: Bluetooth 5.3 sound receiver adapter supports U disk, hands free calling, NFC connection. Support USB removable storage device, can play music without network. 2Automatic Turn on, Stable Signal: NFC bluetooth receiver turns on automatically when connected to power, so it is ideal for use in cars or other vehicles. 10m/32.8ft long distance transmission, built in antenna, reduce signal interference. 3Two Device Connection: Bluetooth 5.3 sound receiver adapter can be connected to two devices at the same time, two cell phones can be switched at will, listen to songs and watch movies at the same time. 4Multi Ports, Wireless Playback: Bluetooth receiver supports simultaneous connection of 3.5mm sound port and 2 RCA sound ports. Ordinary speakers connected to the 3.5mm sound port, without Bluetooth function can also be played wirelessly. 5Calling, Navigation: Bluetooth sound adapter can answer, redial, hang up or reject calls using a simple button. Supports voice notifications from existing navigation apps to ensure safe driving without having to look down. 1 xUSBBluetooth Adapter 1 x Type C Charging Cable 1 x 3.5mm Sound Cable 1 x RCA Sound Cable 1 x English Manual