number pad, rottay mechanical usb wired numeric keypad with blue led backlit 22 key numpad for laptop desktop computer pc black (blue switches) rottay <b>features:</b><br>rottay mechanical numeric keypad <br>-- blue switches<br>professional mechanical blue switches with tactile bump and audible click<br>-- blue led adjustable backlit<br>"esc+del"=support three backlit modes(full-lighting,breathing,lights-off) <br>-- plug&play<br>supports numlock, esc, tab, delete etc. with shortcut key which can open the computer calculator directly<br>--support for windows 2000, for windows xp, for windows vista, for windows 7/8<br><br><b>specifications:</b> <br>brand name: rottay <br> material: abs, aluminium<br>working voltage: 5v ±0.25v<br>working current: 350ma max<br>working temperature: 0+40 °c<br>weight:255g<br>size: 140.5x86x36mm<br>size(with back stands): 177x110x45mm<br>cable length: 1770mm<br>color:black <br><br><b>package includes: </b><br>1 x usb wired mechanical numeric keypad <br>1 x manual