Features: 1. 2-in-1 Numeric Keypad & Calculator with LCD display and USB receiver. 2. Specially designed with PC/CAL key. You can switch and use it as wireless numeric keyboard or calculator freely. 3. Solar power (must in the sunlight): no need to load battery when ONLY use it as a calculator. If you use it as a numeric keyboard, you should put in 2 AAA batteries(not included). 4. Small size. Compact and lightweight. 5. 29 keys design, moderate size: ideal for office. Effectively improve your work efficency. specification:Description: This wireless numeric keyboard with clear LCD display is multifunctional. It can be used as a calculator as well. You can freely switch the two modes (numeric keyboard / calculator) by pressing the PC/CAL key. When used as a calculator, it is solar powered. While when used as a numeric keyboard, you should put in 2 AAA batteries. It can perfectly compatible with your devices that don't have a special numeric key and improve your work efficency. 1. 2-in-1 Numeric Keypad & Calculator with LCD display and USB receiver. 2. Specially designed with PC/CAL key. You can switch and use it as wireless numeric keyboard or calculator freely. 3. Solar power (must in the sunlight): no need to load battery when ONLY use it as a calculator. If you use it as a numeric keyboard, you should put in 2 AAA batteries(not included). 4. Small size. Compact and lightweight. 5. 29 keys design, moderate size: ideal for office. Effectively improve your work efficency. 6. Wide Compatibility: Windows xp / Vista / 7 / 8 / 10, Mac OS 10.3.9 and above. s: Color: Black Material: ABS + Metal Connection: 2.4G USB LCD Display Size: Approx. 77 * 22 mm / 3.0 * 0.9 inch Number of Keys: 29 Battery: 2 * AAA Batteries (NOT included) Solar Panel Voltage: 3V Solar Panel Current: 3mA Compatibility: Windows xp / Vista / 7 / 8 / 10, Mac OS 10.3.9 and above. Package Weight: About 190g Package List: 1 * 2-in-1 Numeric Keypad Keyboard 1 * USB Receiver 1 * User Manual (Other items in the pictures are not included.)