12 digits. 3 Key memory. Large fixed angle display. Cost-sell-margin, mark-up & tax functions. Backspace correction. +/- Change sign. Currency conversion. Durable metal fascia. Auto on when you press any key. Durable metal fascia & hard keys. Rubber feet. Auto off. Solar/battery powered: LR54 (included). Wx Dx H: 101x 150x 23mm.