BT81 The different functions from regular BT dongle are:The maximum accessible connection distance can reach 393 feet. Can connect 5 different devices simultaneously.You can fully use the USB BT Adapter to connect multiple devices simultaneously, time, such as Bluetooth speakers, keyboards, headsets, and mice | BT81 Plug and Play: Supports plug and play functionality for Windows 8.1, 10, and 11. Note: BT81 is not compatible with Mac, Linux. The BT81 is PC only, so the Xbox/PS4/PS5 controller can be used on the PC, not directly on the Xbox/PS4/PS5. Two BT81s cannot be paired | High-Fidelity Audio: USB Bluetooth Adapter is equipped with the latest 2024 Bluetooth 5.4 technology, optimizing the transmission delay and connection defect problems of the old Bluetooth 5.3. It supports Dual mode (BR/EDR+ Bluetooth Low Energy) to achieve low energy consumption, high speed, and a more stable connection with less sound quality loss | Fully Compatible: Backward compatible with BT 5.3/5.2/5.1/4.2/4.0. What Can I do if the Bluetooth adapter can not work?: Ensure there are no other Bluetooth devices installed on the computer. If there are, disable all existing Bluetooth devices in "Device Manager", then insert the adapter and try again | Note :1. Mac OS and Linux computers are not supported 2. Can not directly on PS3, PS4, PS5, TV, set-top box, car stereo system, XBOX and other devices. 3. Note to Apple users: This Bluetooth adapter does not support data transmission for iPhone, iPad and other devices