1 Locking function to avoid other unknowning persons to open the computer. 2 It can be s etted to prohibit getting onto the internet completely or in fixed times. Prohibit long time in play games or chatting. 3 Professionally forbid or limit chatting on QQ,MSN or SKYPE. 4 Unallowed youngster log into pornagraphic or violent websites,but only health and beneficial webs. 5 Portect your private files record.Without the key of Computer Guard, nobody (even God) can view your personal documents. 6 it uses USB2.0 terminal Hub, adapt to Windows 98,Windowsme,Windows2000,WindowsXP,VISTA 8 Unique and fresh design, small and easy to keep and use