Considerate design for comfort Low profile, Quiet soft-touch, Gently-curved key design for all-day comfort for demanding keyboard interaction. Anti-skidding foot pad make every operation enongh firm and stable, non-slip. How to use： 1.Open the rear cover of the keyboard, install one AAA battery(Not included the package, Note the positive and negative directions), The red light will be lit and then extinguish. 2.At the meantime, pls kindly remove the receiver,Insert it to the device's USB interface, and then computer will install the driver automatically, Finally, you can use this Numeric Keypad. Press the "Num LK" key to switch function Red light on,digital zone function is turned on (Number 0-9) Red light off, arrow function is turned on (↑↓←→) Specification: Material: ABS Size: 4.92 x 3.23 x 0.67 inches Weight: 2.85 oz Effective Range: 32feet (10m) Powered by One AAA Battery (Not included)

• Compact and Convenient Wireless Keyboard, Great Accessory for Small Laptops Without A Separate Keypad
• Compact size: 18-key wireless numeric keypad. Hibernation mode enabled automatically, no power button needed.
• Effective Range:Up to 10m working range.Operating frequency: 2.4 G technology.
• Support system: windowns98/95/NT/ME/2000/XP/Vista/7.0/8.0
• Battery operated: an AAA battery（not included）for the keypad to work.

Compact and Convenient Wireless Keyboard, Great Accessory for Small Laptops Without A Separate KeypadBeautyplan