Interface: USB Plug and play: plug and play External power supply: no external power supply Transmission rate: 3 (Mbps) Effective working radius: 10 (m) Bluetooth standard: 5.0 Operating frequency: 2.4 (MHz) Product size: 22 * 16 * 7mm Packaging accessories: adapter * 1; Drive disc * 1 Product features: 1. Barrot br8651a01 chip is adopted, which truly meets the Bluetooth 5.0 technical standard and dual-mode transmission2. Transmission distance: 20m, ultra long transmission distance (no barrier), strong signal3. Transmission rate: 3mbps transmission rate, providing high-speed file and audio data transmission4. The original driver management software is easy to use, powerful and supports a variety of application expansion5. Ultra low delay and high-speed link, intelligent sleep wake-up, energy saving, 24 bit CRC verification to resist interference, adaptive frequency hopping to reduce crosstalk6. Fully downward compatible with Bluetooth 2.0, Bluetooth 2.1 and Bluetooth 3.0 specifications7.USB2. 0 interface is more universal, super mini body and portable8. Supporting system: Windows 7 / win8 / 8.1/win10/win11 (win8 / 10 / 11 system drive free).