This is a remarkably lightweight cordless mouse. Designed to look like an egg, which has a familiar and universally beautiful shape, it weighs only 30 grams. Free from any worry of weight, this mouse can be operated with surprisingly slight pressure, and its light weight reduces strain on the wrist. The basic design employs a truss structure, common in architecture, which ensures sufficient strength across the whole body. To make it so lightweight, the designers even considered the weight of each screw. The mouse has a built-in rechargeable battery.