Note: 1. for the win7-win11 system, win8 above can free drive, win7 needs to download and install a driver to use, please understand, thank you! 2. does not support Apple system Features: 1. Mini USB Bluetooth 5.3 adapter with a high speed of up to 3Mbps. 2. Bluetooth low energy Radio USB Dongle. 3. Dual-mode Bluetooth transfer. 4. Low-power selectable 1.2 to 3.6 VI or O. 5. Supporting Bluetooth voice data. 6. Supporting multiple languages. 7. Compatible with Bluetooth 3.0 or 4.0 or 5.0 or 5.1 or 5.3 8. Free-diver Specification: Color: Green Bluetooth-Compatible version: Bluetooth-Compatible 5.3 Transmission distance: 20m (in an accessible environment) Transmission speed: 3Mbps Operating Frequency:2.45-2.485(MHz) System support: For Windows 7, Windows 8.1, Win10, and Win11. Support protocols: A2DP, HSP, AVRCP, HID, etc Product size: 31 x 15 x 8mm or 1.22 x 0.59 x 0.31 inch Feature 1: Bluetooth USB adapter Feature 2: Bluetooth adapter USB 5.3 Feature 3: USB Bluetooth Receiver Feature 4: Wireless USB Bluetooth Adapter 5.3 Feature 5: USB Adapter for Computer PC Laptop Feature 6: for PC Speaker Wireless Mouse Keyboard Music Audio Receiver Feature 7: for Game Controller Feature 8: for Windows 7 Windows 8.1 Win10 Win11 Feature 9: Bluetooth 5.3 driver-free Package includes: 1 x Mini Bluetooth Adapter