Highlights: Interface: USB Plug and Play: Plug and Play External power supply: no external power supply Transmission rate: 25 (Mbps) Effective working radius: 10 (m) Bluetooth standard: 2.1 Working frequency: 2400 (MHz) Color: White Size: 60*20*8mm Product Description: 1. Lightweight shape: The shape is small and elegant, and it is directly inserted into the USB port of the home stereo system with U disk playback. 2. Bluetooth transmission: The latest Bluetooth technology is adopted, and the data transmission rate is increased to 10 Mbps, which ensures more stable wireless audio transmission, thereby providing high-quality sound, shortening data transmission time and reducing power loss. 3. Stylish design: look good, stylish, simple and generous, is one of your first choice. 4, more compatible: compatible with all A2DP stereo Bluetooth devices such as For iPad, For iPhone4, For iPhone 3G/3GS, first generation iPhone, second generation iPod touch. 5, transmission distance: mobile phone call is very good, no noise, you can answer at 10 meters away. What is in the box: 1 x Bluetooth Audio Adapter Weight: 0.3 SKU: 210616164916