A Push Button switch is a type of switch which consists of a simple electric mechanism or air switch mechanism to turn something on or off . ... This means that when a button is pressed it can cause another button to release. Specifications: Product Name: Push Button Switch Model: LA22C Switch Combination: 1NO 1NC Head Type: Mushroom Head Illuminated or not: No Contact Resistance: 50 mΩ max Mechanical Life: 30000 IEC: 60947 UI: AC660V Dielectric Intensity: 2000VAC Operating Temperature: -20°C ~+55°C Package Includes: 1 x Push Button Switch LA22C