Alcey Aluminum Finish USB Numeric Keypad with USB Hub and 24 inch USB Cable, for iMac, MacBook, MacBook Pro, MacBook Air, Mac Mini, or Any PC Apple-style design creates a natural extension to your Mac. Palm-size and lightweight design effectively saves space, yet doesn't overload your pocket or bag, take a mobile USB work station anywhere you go! Easily adds a number pad and 3 usb 2.0 ports to your existing keyboard for quick and comfortable data entry Supports hot swapping & plug-and-play, and a built-in surge protector incorporated to safeguard your USB devices. Blue LED indicator reveals the power status No drivers required for Windows (32/64 bit) 10 / 8.1 / 8 / 7 / Vista / XP, Mac OS X 10.6 to 10.9, Linux 2.6.14 or above.