Welcome to our store！</br> 1、FUNCTION: Multi function calculator not only has 4 standard arithmetic functions, but also supports percentage, memory subtraction and addition, memory clear and recall. 2、LCD SCREEN: 12 bit digital clear display large digital LCD screen, easy to read from a distance, easy to use, beautiful. 3、INCREASE PRESSURE SENSITIVITY: Calculators desktop adopts scientific design of large buttons, ergonomic design, increase pressure sensitivity, comfortable to touch. 4、DUAL POWER SUPPLY: Calculator is powered by dual power supply using solar energy and built in battery, easy to operate, suitable for office and home use. 5、SAFE MATERIAL: Calculator is made of wood material, safe and eco friendly, the numbers are engraved on the wood, 29 buttons, will not disappear after long time use. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: Solar&nbsp;Powered&nbsp;Calculator Material: Wooden Number of Keys: 29 Keys Production Process: Carving Working Current: 1.5A Operating Current: 4μA Battery Type: 300mAh Li Ion Battery (Ship with Inbuilt Battery) <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Calculator&nbsp;(Ship with Inbuilt Battery)1 x&nbsp;User Manual Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>