The electro-luminescent light generates no heat, but the powersource does to a small extent; it also creates a little buzzing sound which you can hear if you hold it up to your ear. With the everyday din of keystrokes rattling off the electro-luminescent powersupply is not audible.

With the Zippy EL-610 plugged in and the blue electro-luminescent light turned on the keyboard has a really attractive appeal to it. Like a moth drawn to the flame of a bug zapper, the EL-610 has a mystifying effect as words are typed out. As each letter is pressed the translucency changes slightly - this is especially visible with the larger keys like the space bar and enter key - making that one key stand out for a second.