【Equipped with Bluetooth 5.4 Technology】The latest version of the Bluetooth adapter, version 5.4, specializes in power saving, allowing it to operate for a very long time with minimal power consumption. It supports dual mode (BR/EDR & BLE), providing fast response and excellent anti-interference capabilities for a comfortable, lag-free connection. Enhances anti-interference ability. Enjoy 20m of wireless freedom and flexible, convenient operation with the Bluetooth adapter 5.4. 【Connect up to 7 Devices Simultaneously】 This Bluetooth receiver can connect up to 7 devices simultaneously. It's ideal for multitasking, such as enjoying high-quality music while operating a keyboard and mouse. *Note: If multiple audio devices of the same type (headphones/speakers, etc.) are connected, music playback will only be available on one device. USB connection supported, compatible with 99% of commercially available Bluetooth devices, including headphones, mice, keyboards, smartphones, and printers. Easy connection supports work efficiency and entertainment. 【High Compatibility and Easy Operation】 Bluetooth USB 5.4 is fully compatible with older Bluetooth versions 5.3/5.1/5.0/4.0/3.0/2.0. Using a Bluetooth adapter for your computer allows you to connect and use it without installing drivers, which is convenient. The Bluetooth receiver supports Windows 11/10/8.1. Compatible with 32/64 bit. Plug and play, just plug it into your PC, and it connects immediately without drivers on Windows 11/10/8.1 (*Windows 7 requires drivers). 【Enhanced Security & Stable Communication】 With the latest Bluetooth version 5.4, the Bluetooth USB automatically generates a security key for each connection, preventing unauthorized access. It securely protects the privacy of personal data. Class 2 is sufficient for use around a PC. Optimal for use around a PC (communication distance: 20-30m *varies depending on the environment)