Purchased on Amazon in March 2025. Opened and tested upon arrival to confirm functionality. Returned to the box and stored afterwards. Therefore, it is like new. Can be used as a standalone solar calculator. Can be used as a wireless numeric keypad for a computer. Quoted from the Amazon website below: Calculator Number Pad 2.4GHz Wireless Numeric Keypad Calculator 2 in 1 29-Key USB Wireless Numeric Keypad Solar Energy Battery Dual Power Laptop Manufacturer: Vbestlife About this item: 2.4GHZ WIRELESS: This wireless numeric keypad adopts 2.4GHz wireless technology, ensuring stable transmission without delay, plug and play. SOLAR PANEL: This calculator keypad is equipped with a solar panel. When powered by solar energy, this keypad can only be used as a simple calculator. ERGONOMIC DESIGN: This wireless numeric keypad features an ergonomic design for comfortable control and easy portability. 29 KEYS: This wireless numeric keypad has 29 keys and is suitable for laptops, banks, schools, businesses, etc. MODE SWITCHING: When using a wireless connection to a computer, you can use keyboard mode and calculator mode, and switch using the PC/CAL key. #WirelessNumericKeypad #SolarCalculator