In the transmitter mode, the Bluetooth adapter can be paired with a Bluetooth headset or speaker. In the receiver mode, it can be connected to the traditional wired speaker stereo receiver, the auxiliary input port of the car adapter, make them wireless, and connect the mobile phone or tablet to play your favorite music. Featured TF Card Slot: bluetooth adapter for stereo receiver is featured for the TF card slot. You can choose either to play from your smart device or TF card! No matter you are using an old speaker, vintage stereo, or car stereo system, you can easily turn the music into wireless via the 3.5 mm or RCA cables of the bluetooth audio receiver. Bluetooth 5.0: With Bluetooth 5.0 chip installed, USB Bluetooth adapter has a better performance than the previous version in terms of wider transmission distance, faster data rate, and lower power consumption. The display will show the Bluetooth status, and press the previous/next track key at the same time to switch the transmit and receive mode Easy to Use: Plug and play, bluetooth transmitter and receiver without installing any external driver. Universal Bluetooth audio adapter makes your TVs and other devices Bluetooth enabled to stream audio to your Bluetooth headphones, or makes your home stereo bluetooth receiver the wireless streaming from your phone and tablet. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item Please allow 0.1-1cm difference due to manual measurement, thanks Other accessory demos in pictures are not included. Bluetooth solution: 5.0 EDR, A2DP, HSP, AVRCP Frequency: 2.4GHz-2.48GHz Bluetooth transmission distance 10 meters Bluetooth receiving distance 10 meters Charging voltage: DC 5V Bluetooth receiving function: connect 1 mobile phone Bluetooth transmission function: connect a pair of Bluetooth headsets Screen display: can display 8 device names to be paired (transmit) / can display paired mobile phone names (receive) Size: 69*69*23.5mm Shipping color: black Shipment Quantity: 1