Features & Specifications: ~ Two~way Power: Solar (works only when it is bright) and Battery (one AA battery NOT included). Note: Please insert one AA battery for continuous and accurate usage. ~ Large 12~digit display ~ Desktop calculator ~ Tax and Currency conversion, Function and Command Signs ~ Power source:Solar, Battery ~ Colour:Black ~ Number of batteries:1 AA batteries required. ~ Material:Plastic ~ Product Dimensions:2.2 × 14.6 × 5.1 cm 141 Grams Package Contents: ~ 1 x Calculator Notes: ~ Despite every effort to provide accurate images of each product’s colour and design, actual colours and design may vary slightly, due to different device screen settings, the lighting in the installation location, slight differences in product finishes over time and other factors.