Victor 10-digit calculator, 11003a, dual power, 4-1/2″ x 5-1/4 x 3/4″, blue/white mini desktop calculator features an antimicrobial agent that reduces the growth of microbes and bacteria that may cause odors or discoloration. Design features a large angled, eight-digit display. Functions include percent key, square root, change sign, tax keys and three-key memory. Dual-powered calculator runs on solar power with battery backup. Battery is included and replaceable. features tax +/- keys 3 x independent memory keys percent key change sign key square root key larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.