1、Support hot-swapping, plug and play. 2、Compact size, easy to carry. Easy to use and install. 3、Compatible with the USB port of the mouse and keyboard. 4、Take power from PS/2 port and no external power supply needed. 5、Transform USB into PS/ Support USB to PS/2 but not support PS/2 TO USB. Description: This can be used to convert USB 2.0 A male to PS/2 female for keyboard and mouse. Compact design makes it easy to carry with and it is also easy to install. A great choice for you! Features: Compact size, easy to carry. Easy to use and install. Compatible with the USB port of the mouse and keyboard. Take power from PS/2 port and no external power supply needed. Transform USB into PS/ 2. Support USB to PS/2 but not support PS/2 to USB. Specification: Color: Black Length: 4.9cm / 1.9inch Package Weight: 9g Quantity: 2pc Applicable to: for PS2 Mouse & Keyboard Package included: 2 x USB to PS/2 Adapter Note: 1. USB port can only be used to access the mouse and keyboard, can not access other USB devices. (In addition, some mouse and keyboard or the motherboard are not compatible with this head. Can not be used on all the keyboard and mouse.) 2. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.