8-Digit professional mini-desktop calculator is ideal for business professionals at home or in the office. The EL-310WB is finished in a modern white design and features a large angled LCD display and durable plastic keys. Other functions include automatic tax keys, percent key, square root key, backspace key and four key independent memory including memory plus, memory minus, recall memory and clear memory. Extra-large plus key and automatic power down. Operates on twin power (solar/battery backup).