The Casio HS-8G is a high-power solar calculator with an 8-slot display. It has a memory option and a square root option along with the ability to cancel one line of numbers instead of the whole line. Also, it can do % sums. The Casio HS-8G was made in Japan by Casio Computer Co. It requires LR54 (LR1130) batteries. It costs $3.99 from Casio. Its dimensions are 5/16" x 2-1/4" x 4" and it weighs 4.9 oz.