Automatic time switch for staircase lighting exposure devices alarms electric toys etc. This module means that you can switch a device on & have it turn off automatically after a set time between 1second & 30 minutes. There is also a connection for a switch to interrupt the timer & switch the device off manually. In addition to the module a 1 Mandohm linear potentiometer Order Code JM76H is required to adjust the time. 2 push to make switches Order Code N03AR or similar are also required.