ALEKO LM179 Touchless No Touch Door Infrared Sensor Exit Button Switch for Access Control Systems Gates & Garage Openers LM179 featured with infrared technology, touch free, more convenient to use High capacity of relaying dry contact, contactless, free from contagious disease spread The switch responds agilely and quickly, IP-55 industrial protection level Widely used in gate, door, exit automation control LED indication stainless steel plate very durable to us, it is easy to install and convenient to use