1. if you are using a laptop computer with a USB interface, but not a PS / 2 keyboard and mouse interface, if you need to use external interface PS / 2 keyboard or mouse, USB to PS / 2 cables can solve your real problem.
2. there are some name-brand computer is equipped with USB interface, and not with a PS / 2, to use PS / 2 keyboard, mouse, USB to PS / 2 cables can help you.
3. support windows98 / se/ME / 2000 / XP and 98 MacOS9.0 OSX/Linux is suitable for the machines without PS2 interface, plug and play, automatic identification without having to install the driver.
4. support hot plug, suitable to all PCS and laptops.
Scope of application: will a USB to PS / 2, can external PS / 2 keyboard and mouse at the same time, the BIOS can be used.
Please note: buyers reflect use connector, play the CF button will conflict, but the normal use of no problem.