21 keys IP66 rated waterproof and vandal resistant rugged brushed 304 stainless steel industrial backlit keypad, this is a compact, and rugged panel mounted IK09 rated vandalproof keypad for kiosks and charging piles. It is specially designed to meet IP65 specifications, which means it is resistant to harsh environment such as dirt, dust, water, ice, oil, etc. And it’s LED backlight design to meet the requirements of using in dim or dark environment.