<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 ℃<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