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: type XB2-BS142 brand name place of origin: China material: metal certificate: GB 14048.5-2008,IEC 60947-5-1 ambient temperature: -25ºC~55ºC IP rating: IP40, IP65 is available on request rated voltage: 125V 240V 250V 380V vibration resistance: <500HZ, amplitude is about 1.0mm shock resistance: >=10g Package Includes: 1 x Mushroom Push Button Switch