Latest Bluetooth 5.4 Adapter: Equipped with the latest Bluetooth 5.4 technology, offering enhanced security, reliability, and backward compatibility with old Bluetooth 5.3/5.0/4.0 devices. Supports Dual Modes (BR/EDR+ Bluetooth Low Energy) to achieve low power consumption, faster speed and further coverage. Quicker response and better anti-interference. Plug n Play & Compatible Devices: This BT54H Bluetooth 5.4 Dongle is developed for Windows 11/10/8.1/7 and Linux Non-Bluetooth PC/Laptop/Desktop only and does not support other systems. No driver installation is required under Windows 11/10/8.1 Linux OS (Internet Required). Supports Win7 (Driver required and can be downloaded from website for free). Up to 7 Devices Connected SYNC: Krisnorey USB Bluetooth adaptor for PC supports up to 7 different types of Bluetooth devices to be paired and connected at the same time without interfering with each other, including Bluetooth Headset, Speaker, Keyboard, Mouse, Game Controller, Printer,