Standard Function ELECTRONIC Calculators with 12 Digit Large Lcd Display, Handheld Desk Calculator For Daily And Basic Office Product Nice Appearance - 12 digits display and large numbers , easy to read. Big and sensitive keys for simple calculations, perfect for office, primary school, market or home useSolar 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 useBasic Calculator - Add, subtract, multiply, divide, backspace, % and MU. Auto-off when you do not use it about 10 minutesCalculators Large Display - ABS 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 itNote: 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.