<p>AML21BBA2AC electrical push button switch from Honeywell has DPDT circuitry and comes with silver or gold contacts. It has a momentary or 2-level alternate action of push-on and push-off. In order to operate it with a lamp, the user needs to order and install the lamp separately.</p><p>Electrical Push Button Switches are usually made of metal or plastic and are designed to deliver instant tactile response. This particular Honeywell switch, apart from being used in home and commercial appliances, is also used in various mechanical and electronic devices. Push-button switches are also known as biased switches; work on a simple electric switch principle. They are a type of momentary switch in which the user needs to push-for "on" or "off" in order to control some aspect of a machine or a process.</p>