1pcs Mechanical Switch Calculator,Handheld for Daily and Basic Office,10 Digit Large LCD Display (Black),without attery,150*92*30mmMechanical Blue Switches Professional mechanical Blue switches provide fast and precise key presses bring pleasant use experience. The finger tactile bump and the unique audible click is addictive.CuteRetro & Ergonomics Design Using the simple line and Retro round keys like typewriter style . The thick tube body size is suitable for desktop use and also for handheld use. The large round keycap fit your hands easily to prevent fatigue. Spring type ergonomic design, care for your wristLCD DisplayThe display is designed with a 15 tilt screen for optimum field of view and stability. It is convenient and comfortable to calculate and read the screen. It will automatically shut down after 7 minutes in unused state, saving energy and electricityRemarque : les donnes sont toutes mesures manuellement, veuillez autoriser une erreur de 1 3 cm, en raison de la diffrence de lumire et d'affichage, il y aura une certaine diffrence de couleur, l'objet rel reu prvaudra.