2. EDR & BLE Dual-Mode Bluetooth Dongle Simultaneous Enhanced Data Rate (3Mbps) and Low Energy modes optimize power and speed. This Bluetooth USB adapter reduces latency for keyboards/mice while extending headphone battery life by 30%.1. Bluetooth Adapter for PC with 5.4 Chip Upgrade any USB 3.0 PC/desktop to Bluetooth 5.4 via this USB Bluetooth adapter. Backward compatible with Bluetooth 2.0-5.3 devices. Ideal for adding wireless connectivity to non-Bluetooth Windows systems.5. Compact 7-Device Bluetooth Dongle Low-profile design wont block adjacent ports. Connect mouse+keyboard+headphones+speakers+3 more devices via one Bluetooth adapter for PCreplace cable clutter effortlessly.3. Plug-and-Play USB Bluetooth Adapter Works instantly on Windows 8.1/10/11 (driver-free). Win7 users download drivers once. The Bluetooth dongle auto-reconnects paired devices on startupno repetitive setup.4. 65ft Range Bluetooth Adapter for PC 20m open-space range (reduced through walls) ensures stable connections. This Bluetooth USB adapter delivers 3Mbps transfer speedssend 100MB files in <30 seconds.