Upgrade USB Bluetooth 5.3 Adapter: UGREEN USB Bluetooth 5.3+EDR transmitter is equipped with a Bluetooth 5.3 chip, faster connection, stronger interference-proof, and higher 2 times transmission efficiency than Bluetooth 4.0. 7-Devices Pairing Simultaneously: UGREEN USB Bluetooth 5.3 dongle supports 7 different Bluetooth devices pairing simultaneously. Such as wireless headset, keyboard, mouse, Bluetooth speaker, printer, etc. Help to switch the non-Bluetooth devices to Bluetooth-enabled. Backward compatible with the prior Bluetooth version. EDR and BLE Technology: Enhanced Data Rate and Bluetooth Low Energy Technology, brings this Bluetooth dongle greatly improves the data transmission rate and minimizes power consumption to keep the best performance. Stable Signal Connection: With Bluetooth 5.3 technology, UGREEN USB Bluetooth receiver reduces signal transmission delay and provides solid signal connection. Immersed yourself in a smooth connection without any annoying static interruptions or choppy connections. Transmission Distance up to 66ft/20m under the condition of no barrier. Plug and Play on Windows: No driver is needed, this USB Bluetooth adapter is plug and play on Windows 11/10/8.1. The portable size is only 33mm * 17mm * 8mm and easily slides into your backpack, pocket, or laptop bag. Follows with a dust cap to effectively protect the USB interface without damage and dust.