The USB to HID keyboard and mouse module utilizes the CH9329+CH340E chips. Users can send commands to the module via USB. The module converts the USB commands to serial ports, which are then converted into HID reports and sent to the computer. This eliminates the need to learn the complex HID keyboard and mouse protocol, reducing development effort. This module supports four functions: USB keyboards with standard and multimedia keys, and USB mice with relative and absolute mouse functions. Built-in USB 2.0 to serial and standard serial to HID converters. Supports full USB keyboard and mouse functionality. USB-5V power supply. USB 2.0/HID transmission. Color:Blue Material:Plastic+Metal Package Contents: 1 * CH9329 Module 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.