The Victor 907, 10 digit calculator features 20 built-in metric conversion functions including: length, area, capacity, weight, volume, energy and temperature conversions. The calculator includes an easy to read LCD display. Other functions include: backspace, change sign, percent, and square root keys as well as three key independent memory. Contemporary silver and black design. Operates on hybrid power (solar and battery backup).Details:Silver and black2 calculatorsMake quick work of complicated problemsLarge 10 digit LCD display20 built-in conversion functions2 year manufacturer's standard warrantyFor ages 10 and up