Bamboo Office Calculator 12 Digit LCD Display School Special Gift Christmas Calculation Commercial Tool Battery Solar Powered Features: 1. The calculator design of 12 digits, the results do not round 2. When operation digits exceed 12, error handling occurs, reset only by pressing the ON/AC 3. When inputting error, press the backspace key to delete digit by digit 4. The calculator automatically shuts down after 12 minutes of no operation, then enters sleep mode; press ON/AC to wake it 5. When the operation result exceeds 12 negative digits, the negative sign does not display 6. Please avoid using it under strong light Specifications: Power: Solar Dimension: about 170*82*19mm (6.69x3.22x0.75 inch) Battery: Solar powered, no need to replace battery How to use: Please wipe the LCD screen and solar panels with a soft dry cloth. Store in a dry and cool place when idle. Do not place the product in water or under direct sunlight Package included: 1 x Bamboo Electronic Calculator