CALCULATOR NUMERIC KEYPAD FUNCTION 1. 2.4GHz Wireless: This wireless numeric keypad uses 2.4GHz wireless technology, ensuring stable transmission without delay, plug and play. 2. Solar Panel: This calculator numeric keypad features a solar panel. Powered by solar energy, it functions as a basic calculator. 3. Ergonomic Design: Designed ergonomically for comfortable use and portability. 4. 29 Keys: Equipped with 29 keys, suitable for laptops, banks, schools, businesses, and more. 5. Switch Mode: Offers keyboard mode and calculator mode; switch between modes using the PC/CAL key when connected wirelessly to your computer. Specification: Item Type: Calculator Numeric Keyboard Material: ABS Number of Keys: 29 Interface: USB Connection: 2.4G wireless Button Technology: X architecture Battery Type: 2 x AAA alkaline battery (battery not included) Compatibility: Universal Package List: 1 x Calculator Number Pad 1 x Receiver 1 x User Manual