Fangrui Product Details Upgrade Bluetooth 5.3: This Bluetooth Adapter Has A Faster Data Transmission Speed And A Larger Amount Of Data Transmission And Reception. In Addition, The Transmission Distance Is Increased And The Ability To Penetrate Walls Is Also Enhanced. Backward Compatibility: This Bluetooth Adapter Can Be Compatible With Bluetooth 2.0/3.0/4.0/5.0/5.1 Devices, With A Bluetooth 5.3 Adapter, You Can Easily Solve All Other Bluetooth Connection Problems. Free Drive, Plug And Play. This Bluetooth 5.3 Is Driver-free, Plug And Play. Compatible With For 8.1/10/11. It Should Be Noted That It Is Not Suitable For Win7/8, Os, Linux, , Tv. Material: Metal+plastic Colour: Black Package Contents: 1 X Usb Bluetooth Adapter Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.