The TX-220TS is the perfect calculator to utilize in any office setting. At a glance, you will be captivated by its sleek look. Once you use it, you will be amazed at how easy it is to operate with its large color-coded keytops. The handheld display calculator also incorporates an adjustable tilt LCD with extra-large readouts and impressive calculating functions. Functions include quick, easy tax calculation; profit margin calculation; grand total key and decimal positions (A, 4, 2, 0, F). Its dual power capability - both solar and battery - ensure operation even in low light.