Longer transmission distance: 100 meters ultra long transmission distance (without barriers), strong signal. More stable transmission rate: 3Mbps transmission rate, providing high-speed file and audio data transmission. Support system: 8.1/10/11 (plug and play) Fully backward compatible with Bluetooth 2.0, Bluetooth 4.0, and Bluetooth 5.0 specifications. USB2.0 interface is more versatile Colour:black Material:plastic Package Contents: 1 x 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. Adopting ATS2851 chip, supporting dual mode (BR/+low energy controller) Adopting an external antenna to enhance transmission distance, meeting Bluetooth Class 1 standard and transmitting over 100M ultra long distances. Complies with Bluetooth 5.3 technical specifications, LMP version 12.513. V5.3 supports dual mode, ultra-low power consumption, and all technical performance far surpasses other versions of Bluetooth technology currently available. The V5.3 Bluetooth adapter is a new Bluetooth adapter product launched in the market, paired with a USB2.0 interface, to cope with the current data audio data interaction between PCs and various Bluetooth devices.