The product is a wonderful calculator which is powered by solar energy without any external battery and displays 8 digits on the screen. Besides, it adopts touch panel for digital input, and very convenient. With portable design and easy to use, it is suitable for home and office use. Features - Color: Purple. - Material: Plastic. - Size: Approx. 80 x 119 mm. - It is powered by solar energy, no external battery needed. - Adopt transparent touch panel for digital input, very convenient. - Compact size, light weight, easy to use and convenient for carry. - Perfect for school, home and office use. - Built- automatic on and off. It will automatically after 1-2 mins if not use. Package list: 1 x calculator