Features With Time RangesSelected: It is a timer relay countdown off module, There is a wide time range, the delay time is adjustable from 1 second to 99 seconds, or 1 minute to 99 minutes; use a jumper to select second/minute Trigger to Connect, and will disconnect after delay time; if trigger during delay time, it will disconnect immediately.It's important to recognize that the trigger has to be a pulse. Look at the module sequence diagram. It shows that when the pulse goes high the relay gets triggered (turned on). While the pulse stays high , the relay stays triggered. Then, when the pulse goes low a delay starts which will turn off the relay. Normally the module will start to work when triggered, if you need module to work immediately after power on, connect 2 terminals of trigger APPLICATIONS: widely used in home intelligent system, anti-theft alarm system, door control system, automation equipment control, PLC industrial control, electronic development, etc. Delay Time Display:Designed with a LED display that will show the delay time Features: It is a timer relay countdown off module with high precision, stable and reliable performance. Trigger to connect, and will disconnect after delay time;  if trigger during delay time, it will disconnect immediately. Normally the module will start to work when triggered, if you need module to work immediately after power on, connect 2 terminals of trigger. There is a wide time range, the delay time is adjustable from 1 second to 99 seconds, or 1 minute to 99 minutes; use a jumper to select second/minute. Designed with a LED display that will show the delay time. Specifications: Voltage: D12V Load Capacity: 10A 250V AC; 10A 30V DC Delay Time: 1~99Sec./1~99Min.(adjustable) Size: 70 x 40 x 18mm / 2.75 x 1.57 x 0.7" Quantity: 1 Package Includes: 1 x Timer Relay Module Package List 1 x Timer Relay Module