Thus, when you go to travel, you can take the laptop and the mini-mouse. When you work at your home PC you can use the big one. Some people can think that the problem and its decision are far-fetched, but is it really expensive to pay 21 dollar for such an unusual device? "Nested doll" weighs 104 g , the resolution of an optical sensor is 800 dpi.
The other company sells the similar mouse but in "football" variation - 06 World Cup USB Twin Mouse.