Both calculators work. One calculator does not have a cover on the back for the battery. See pictures The product is a lot of 2 Sharp QS-2130 scientific calculators, designed for desktop use. These calculators feature a regular-sized keypad and a unique solar function with a battery backup for added convenience. The model QS-2130 by Sharp is known for its reliability and accuracy in solving complex mathematical equations, making it a practical choice for various office and industrial applications.
eBay