This touch free button applies NoTouch technology which helps reduce the spread of germs in public buildings. To exit, a person must simply wave their hand in front of the device. The infrared will pick up the motion and unlatch the time adjustable door. NoTouch Cast Aluminum Switch allows user to open a protected door without the touch of a button. Has an adjustable relay latch 0.5~20 seconds, dual color status LED (green/red or red/green), Form C dry contact, 0.5A @120VAC, 1A @24VDC.