MODEL- EL-243SB DESC.- SHARP ELECTRONICS CORP. FEATURES- Handheld Calculator * Twin-powered basic hand-held calculator with extra-large display. * Extra-large 8-digit (13mm) LCD readout. * Automatically switches from solar to battery power in low light. * 3-key memory. * Percent and square root keys. * Operates on 1 LR1130 battery for back-up power. * Battery included. * Dimensions: (3.98