Lenovo Go Wireless Numeric Keypad - Keypad - wireless - 2.4 GHz - key switch: Scissor-Key - storm gray - retail. Go beyond the limitations of your notebook and complement your workflow with a tactile, responsive 21-key keypad that sports premium scissor-switch keys and is compact enough to take on the go. With an impressive up to 3 months of battery life and a powerful 2.4 GHz wireless connector, you can rest easy knowing that your numeric keypad will be ready for action whenever you are.