The Casio MS-100MS calculator has everything you need for percentage and tax calculations, including a large screen with 10-digit display, 3-digit comma markers and a Euro conversion key. Product details: - Tax calculation - Double zero key - +/- button - Independent memory - Two-way power (battery & solar energy) - Dimensions (H x L x W): 30.7 x 103 x 14.5 mm - Weight: 120 g - Battery: 1 x LR54