Stable Transmission: Built-in wireless enhancement signal to achieve 20 metres barrier-free long-distance transmission connection is stable and smooth, refusing to intermittent / disconnected. Multi-device connection: Bluetooth BT5.4 supports multi-device simultaneous connection without lag, compatible with Bluetooth mouse/keyboard, Bluetooth headset, Bluetooth audio, gamepad, printer, mobile phone, tablet. Compatible Bluetooth version: It is automatically backward compatible with Bluetooth devices 5.3/5.2/5.1/5.0 and below. Built-in device: Bluetooth 5.4 chip for faster transmission speeds, more device connections, and more stable transmission conditions. No driver required: plug and play, wireless life, USB Bluetooth 5.4 adapter, compatible with Win system Win7/8.1/10/11.