Eco-friendly professional desktop calculator without batteries, 100% ECO. The material used consists of 70% recycled plastic. "Blauer Engel" certificate. Extra large solar panel for battery-free use. Large 12-digit LCD screen, tiltable. Large buttons. Automatic shutdown. Memory with 3 buttons. Non-slip rubber protection. Root, delete key, mark-up function, grand total. Decimals F, 3, 2, 0, A. Round up, round down 5/4. 3 year warranty. Dimensions: LxWxH: 133 x 188 x 34 mm. RAL-UZ 116 certificate.