Compact, portable and flat design with thin body, pretty lightweight, convenient to put in a pocket, handbag and school bag 12-digit display, powered by an LR44 cell battery (Included), which will last for 2 years owing to energy-saving mode and auto power-off function Quiet button design, so you won't disturb others when pressing the buttons, a real friendly device for heavy-duty calculator user; Durable buttons, capable of tens of thousands of pressing Equipped with antiskid mats on the back side, the calculator won't move about when pressing its buttons; When placing the calculator on your desk, the support frame makes a 15-degree angle for easy reading Antiskid finish makes it feel comfortable on your hand, and it won't slip away, a simple, beautiful and reliable device for your work at school, office and daily home use