COOL LEAF is a keyboard that slim - flat on the ground, smooth. By the above it is that reflective surface as part as well. Which the manufacturer said it made from plastic film PET overlap, to 2 000 I, no matter มันจะหมายถึง whatever. But the sensor signal overlap channel under the keyboard can detect the pressure of the finger touch the glass surface force as soon as the top. Although looks like glass in general, but LED below can illuminate. To let the light through the channel character of the buttons. It appeared to be obvious, especially where less light or light within the building, the user can adjust the volume. Beep to let know you hit them.