MOJO Wireless Numeric Keypad Portable Compact Number Pad NumPad Keyboard for Desktops/Laptops 18 key numeric keypad perfect for working with spreadsheets, calculations, etc., Wireless connection so you can work easily at your own convenience (requires included USB adapter to connect) Powered by 1 AAA battery (not included) Keypad buttons include: 0-9, - , + , / , * , Num Lock, Backspace, Del MOJO LLC offers an exclusive manufacturers warranty for 60 days with this keypad. This warranty is exclusive to sales through MOJO only. Purchases made from unauthorized resellers are not eligible for this warranty.