Normally Open: when the on-off switch is not pressed, the on-off power supply is in working state when the power supply is not pressed, and when the on-off switch is loosened, the on-off power supply is not connected.Normal Closure: Push-release is not on time when the power supply has been in working state, press when the disconnection is not on, stop work, loosen and in continuous work.Name: Reset button switch[Opening] 6.8MM[Parameters] 1A250V 3A125V[Model] PBS-110 is normally open and PBS-111 is normally closedFunction: Normally Open(Press on)-Press the switch to turn on electricity, loosen the switch to turn off powerNormal Close(Press off)-Press the switch to turn off the power and loosen the switch to turn on the electricity.