Welcome to our store!</br> 1、1. It truly complies with Bluetooth 5.0 technical specifications, dual-mode low-power transmission, our wireless audio adapter makes the connection with the device more stable, 10-20m long transmission distance (no barrier), strong signal. 2、2. More stable transmission rate: 3Mbps transmission rate, providing high-speed file and audio data transmission, the computer can transfer files between the mobile phone and the tablet even if there is no network, and the transmission is more convenient. 3、3. Compatible: Backward compatible with 4.0/4.1/4.2 and other versions, Bluetooth connection headsets, listening to operas and watching dramas, wireless more freely, you can move around in various positions in the room or freely, no longer need to sit next to the computer. 4、4. Automatically connect: After the device is connected for the first time, it can automatically remember, and automatically connect when it is turned on again. Say goodbye to frequent connections. Bluetooth wireless transmission and WiFi signals do not interfere with each other. 5、5. Portable: USB2.0 interface is more universal, ultra-mini body shape is portable. Applicable operating system: support Windows7/win8/win10 mainstream operating system. Product name: Mini 5.0 Bluetooth Adapter Material: ABS Bluetooth version: 5.0 Interface type: USB 2.0 Transmission rate: 3Mbps Working frequency: 2.4 (MHz) Product net weight: 130g Bluetooth remote distance: Straight line distance 10-20m Voltage: 5V Support system: Windows 7/8/8.1/10 1*Mini 5.0 Bluetooth Adapte (Customer Satisfaction) - is our priority. If you notice any problems with the products after receiving the goods, such as damaged goods or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sale service.</br>