Kind reminder: Win8 or above driver free, Win7 requires driver installation Feature: 1. Upgrade Bluetooth 5.3+BLE (LMP:12.45) 2. Compatible with Bluetooth versions such as 5.2/5.1/5.0/4.0/3.0/2.0. 3. Low power consumption, low delay, and high-definition sound quality 4.Win8.1/10/11 driver-free, plug and play, Win 7 needs to install drivers. 5. Connect once, and connect automatically. 6. Support simultaneous connection of multiple devices 7. Wide compatibility (Bluetooth headset/speaker/Bluetooth mouse/keyboard/Bluetooth handle/printer/Android) 8. External dual antennas, 150 meters distance 9. Support A2DP/HSP/AVRCP/HID/SBC/AAC and other protocols 10. Drive Free 11. 150 meter work distance(open distance) 12. For PC Mouse Keyboard speaker earphones Specification: Bluetooth-Compatible: 5.3 Color: Black Transmission distance: 150m (in an accessible environment) Chip: (RTL8761BW) Supported protocols: A2DP/HSP/AVRCP/HID/SBC/AAC and other protocols Package includes: 1x USB Bluetooth 5.3 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia