1、Multifunction: Bluetooth 2 sound receiver adapter supports U disk, hands free calling, NFC connection. Support USB removable storage device, can play music without network. 2、Automatic 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/38ft long distance transmission, built in antenna, reduce signal interference. 3、Two Device Connection: Bluetooth 2 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. 4、Multi Ports, Wireless Playback: Bluetooth receiver supports simultaneous connection of 5mm sound port and 2 RCA sound ports. Ordinary speakers connected to the 5mm sound port, without Bluetooth function can also be played wirelessly. 5、Calling, 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 x USB Bluetooth Adapter1 x Type C Charging Cable1 x 3.5mm Sound Cable1 x RCA Sound Cable1 x English Manual Item Type: USB Bluetooth AdapterMaterial: ABSUse: Bluetooth AdapterOutput Interface: 3.5mm Stereo, RCA Left and Right ChannelFunction: U Disk, Hands Free Call, NFC ConnectionBluetooth Protocol: AVRCP, A2DPBluetooth Version: 5.2 (compatible with 5.0)Frequency Range: 2400- 2483.5MHzOutput Power: 28mWSignal to Noise Ratio: ≥90dBForward Transmission Distance: Approx. 10m/ 32.8ft