Minebea, a Japanese company has unveiled its latest keyboard known as COOL LEAF. This latest input device has no physical button like the typical input device like keyboard, calculator etc. This is said to be cool and water-resistant keyboard. The cool leaf is a low maintenance and easy to clean device. This film is actually an electrostatic capacity type touch panel containing force sensors beneath, plus a backlight which serves as the lower layer. When the keyboard is switched off, the surface appears like a plain mirror.