High-Fidelity Audio: UGREEN 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 5.0. 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. Plug & Play or Free Driver Plug and play for Win11/10/8.1(The latest Bluetooth 5.4 will be shown if you download the driver). Also supports Win7 (driver required for Win7). The driver could be downloaded by contacting customer service via Message. Up to 5 Devices Sync Connected: You can fully use the USB Bluetooth Adapter to connect multiple devices simultaneously, Can work with 5 devices at the same time, such as Bluetooth speakers, keyboards, headsets, and mice. Rotatable Antenna Design: The compact Bluetooth antenna can rotate 180° to get a better signal and keep a stable Bluetooth connection. It can provide m