67 Function Scientific Calculator This solar scientific calculator comes with a highly efficient solar panel that requires only 50 lux, works with any available light. Will never need batteries. 10 digit LCD + 2 digit exponent. 15 levels of parenthesis. 67 functions, plus; binary, octal decimal, sexagesimal, and hexadecimal conversion, and standard deviation. Comes with a soft carrying pouch and complete instructions.Dimensions: 5-1/4 x 2-3/4 x 7/16Weight: 2 oz 67 functions 12 or 10 digit LCD with 2 digit exponent Auto power off Handy storage memory for storage of conversions Capable of 15 levels of parenthesis Downloads Instruction Manual Product Brochure