Bestwya 12-Digit Dual Power Handheld Desktop Calculator With Large, Pack Of 5). Calculators Large Display - 12 digits display and large numbers , easy to read. Big and sensitive keys for simple calculations, perfect for office, primary school, market or home use Solar Power Calculator - Solar power(works only when it is in bright light) and battery power (1 AA battery included). If the solar strip is blocked, the numbers in the display will disappear. Please put the battery in the calculator compartment before use Basic Calculator - Add, subtract, multiply, divide, backspace, % and MU. Auto-off when you do not use it about 10 minutes Calculators Large Display - PS material, size 5.7 x 4.7 x1.8 In, weight 4 Oz (1 Piece). Doesn't take up much desk space, but it's big enough to be comfortable using it Note: Some buyer may use it in the early morning or night. The screen maybe difficult to read in low light without battery power. Please insert our AA battery for continuous and accurate usage. If you have any question about our product, feel free to contact us, and we will reply within 24 hours