Storin 2.4G USB Silent Financial Wireless Numeric Keypad for Laptop/Tablet/Desktop - 18 Key Brand : Storin Electro World  Colour : Black   Description :  -> Compact,comfortable to use and easy to carry -> Help you tohandle with numbers more professional and efficiently wherever and whenever -> Simple plugand play, no driver installation requirements -> Wireless transmission, fast and sensitive, up to 10-meter working range -> "NumLock" key, switch to the number(0-9) function and other functions.   Specification :   -> for businesses that handle high numeric tasks, the 18 keys USB numeric keypad enables a more streamlined, efficient workflow. -> The keypad can be attached to your computer or to a kiosk, creating a dedicated space for numeric data entry. -> Keyboard comes with 18 keys of 0-9 number keys, Del, Enter, Num Lock, Backspace, + - * / -> Best for Notebook users who always work with number keys / mini digital keyboard -> Item Name: Wireless Numeric Keypad -> Number ofKeys: 18Keys -> Interface: Wireless 2.4G -> Voltage: DC 1.5V -> Case Material: ABS -> Keycaps Life: More than 10 million times -> Operation Range: 10M (Without signal disturbance and no direction limit) -> Power: 1*AAA Battery (Not Included) -> System Support: Windows XP/7/8, Vista, Linux, Mac os 9.   Package Includes :   -> 1x Wireless Numeric Keypad -> 1x Mini USB Receiver   Note :   -> This numeric keypad is not fully compatible with Mac system. (Number keys do not work, while function part works fine.) -> Battery is not included.