Very nice SOLAR calculator! Clean, large display, large keys, not heavy and nice size for a desktop. Very lightweight and not overwhelmingly bulky.

Per Officeworld.com website:
"2-Digit Desktop Tax / Exchange Dual Calculator – Adjustable Display, Auto Power Off, Solar, Battery Powered – 12 Digits – LCD – Battery / Solar Powered – 6" x 8" x 1.5" – Silver"