Like a calculator or PC keyboard number pad, the HP CalcPad 100 Numeric Keypad is easy and intuitive to use. The HP CalcPad 100 Numeric Keypad comes equipped with a built-in 2-port USB hub extends the number of devices you can connect to your PC. If you crunch numbers on the road or in the office, check out our handy HP CalcPad 100 Numeric Keypad.