This ready-to-use calculator needs just one Aaa battery to power on, you will get two included batteries total-one pre-installed so you can start calculating right when it arrives, plus one extra spare. It makes a charming retro desk companion, a soft rose pink finish, rounded keycaps, vintage styling that adds a playful touch to your workspace, making daily work, study, budgeting more enjoyable. Each press of the raised mechanical switch keys delivers a satisfying, responsive click with tactile feedback, creating a more engaging typing experience than standard flat-button calculators. It features a clear wide Lcd screen that displays up to 12 digits at a glance, paired with an ergonomic tilted design for comfortable viewing during all your calculation tasks. Available colors: Cream Pink, Rose Pink.