Description: It can be used to convert USB 2.0A male to PS/2 female for keyboard and mouse. Compact design makes it easy to carry and install. Perfect for you! Function: Support hot swapping, plug and play. Compact size, easy to carry. Easy to use and install. Compatible with USB ports for mouse and keyboard. Powered from PS/2 ports, no external power supply needed. Converts USB to PS/2 Supports USB to PS/2, but does not support PS/2 to USB. Specifications: Color: Black Length: 4.9cm /1.9" Package Weight: 9g Quantity: 2pcs Applicable for: PS2 Mouse Keyboard Package included: 2 x USB to PS / 2 Adapter Note: 1 The USB port can only be used for access to mouse and keyboard, and other USB devices are not accessible. (In addition, some mouse and keyboard or motherboard are not compatible with this head. Not all keyboard and mouse. 2. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 3 Monitor is not calibrated same. Item color displayed in photos may slightly differ from the actual object. Keep it standard and authentic.