Bear Motion Standard Function Desktop Handheld Calculator Large 12-digit Display - Battery Required / with Solar Panel as Secondary Power Source<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>One AAA Battery Required (NOT included) - This calculator requires an AAA battery to operate correctly. It also has Solar Panel as a secondary power source. It will automatically switch to solar from battery when solar power is strong enough. However， battery is required to ensure continuous operation without disruption.</li><li>Large 12-digit display for Desktop or Handheld</li><li>Size: 5.8 inch X 4.3 inch X 1.4 inch</li><li>perfect size for office business and home use more preferential info as follows</li><li>Durable construction that is designed to last</li></ul></div><img src="http://ecx.images-amazon.com/images/I/511jmR3rN%2BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51gIQQ0kLvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51CitS3fwAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ksfEiT41L.jpg" noproxy>