CALCULATOR NUMERIC KEYPAD FUNCTION 1. 2,4GHz Wireless: This wireless numeric keypad uses 2,4GHz wireless technology, which ensures stable transmission without delay, plug and play.2. Solar Panel: This calculator numeric keypad has a solar panel. Powered by solar energy, this numeric keypad can only be used as a simple calculator.3. Ergonomic Design: This wireless numeric keypad has an ergonomic design that provides comfortable control and is easy to carry.4. 29 Keys: This wireless numeric keypad has 29 keys, suitable compatible withlaptops, banks, schools, businesses, etc.5. Switch Mode: When using a wireless connection to your computer, you can use keyboard mode and calculator mode and switch using the PC/CAL key.Specification: Item Type: Calculator Numeric KeyboardMaterial: ABSNumber of Keys: 29Interface: USBConnection: 2.4G wireless networkButton technology: X architectureBattery type: 2 x AAA alkaline battery (battery not included)Applies to Type: UniversalList of packages: 1 x Calculator Number Pad1 x Receiver 1 x User Manual