Professional manufactured USB Multi-Function Numeric Keypad can be widely used in broker firm, notebook computers, banking, karaoke, medical etc. Just Plug and play, no driver needed. Features: Made of superior material. Numeric Keyboard with LED indicator. Slim and lightweight design, ideal for mobile user. Ultra thin notebook computers caps design, Aesthetic appearance. Durable structure, long life Non-synchronous digital input, no affection to the other keyboard Compatibility: IBM, PC, AT, MAC Button design: 19 bonds Key trip: 3.0+- 0.3mm Surcharging height: 0.25+- 0.05mm Key life: 800 million and above Interface: USB OS: Windows 98 SE/ME/2000/XP/Vista Mac OS 10.4 above Product size: 100 X 130 X 15mm Package Content : 1 X USB Multi-Function Numeric Keypad (Note : Photo attached is for reference only, it may be slightly varied in items of colour, shape from the actual item delivered from time to time)