Battery PoweredThis small game handle calculator utilizes battery power (battery included). Pull out the film that prevents battery power when in use. If the battery is exhausted, you can replace one LR44 1.5v button battery.^Modern DesignThe gamepad calculator uses premium PS plastic as the material, which has a unique and novel appearance and is full of design. The 8-Digit LCD display, pocket size, small body, save space and portable.^Details InformationSize: 4.5 x 3.1 x 0.7 inch (11.5 x 7.8 x 1.8 cm). Weight: 4.2 oz / 120g. It can be a pocket calculator. Thickness of the body is only 0.7 inches, and can be easily put into backpacks and pockets.^Multiple UsesThis calculator with standard function is suitable for many occasions: school, home, business, office, basic budgeting and more. Use it to assist your personal finance or just a quick calculation. This Gamepad calculator can be a great gift to people who likes playing games.^FunctionalitiesAdd, subtract, multiply, divide, total, square root, percentage, M+/M-/MR/MC, CE/On/Off Button, and Auto Power-Off.