OSALO OS-7714C HD Large Screen ABS Finance Calculator Solar/Battery Powered 14 Digit Desktop Calculator ?With a large HD 14-digit LCD display for easy reading ?The electronic calculator supports solar power supply and battery power supply ?Designed with rubber feet pads at the bottom,prevents sliding while in use ?Made of quality ABS material,with large keys,durable to use ?With check forward and check backward function keys ?Suitable for many occasions: business,financial,office,shop,home,school,and more Specification: ?Product size: 149*192*42mm ?Material: ABS ?Dual power supply: solar or 1 x AAA battery (battery not included) Note: It is recommended to install the battery to avoid insufficient light,resulting in an incomplete display. Package included: ?1 x Calculator ?1 x English and Spanish User Manual