BETTER PERFORMANCE: Enhance anti-interference ability and stability, new technologies have been adopted to reduce the loss of transmission efficiency caused by interference in the 2.4 GHz band. Alleviating the problem of the instability of the device connection, frequent disconnection, and signal interruption. Our USB Bluetooth adapter applies the Class 2 radio technology, the transmission distance can reach 10 - 20m in an open place, can cover more distance space. MINI SIZE: Extremely compact USB adapter allows you to leave it on laptop or PC, no need to remove, without blocking surrounding USB ports, ultra-compact, easy carrying and space saving. Bluetooth adapter interface is designed for 24K gold plating, which can effectively prevent USB interface from oxidation. WORRY FREE CUSTOMER SUPPORT: Please instal drivers via mini CD disc, or install the driver through the manual. Or contact customer service for driver file and intallation step.