People with excessive hand sweat could be very annoyed with their wet hands when working using mouse and keyboard. They need a towel or handkerchiefs to keep their hand, keyboard and their mouse dry. Fortunately now they can use Coolermouse, a mouse with embedded cooler fan to keep their hand dry. The cooling fan is powered by USB and it has an on/off switch. Although this mouse is so cool, it has a small drawback because it produces noise when the fan is on. The USB cooler mouse costs $19.