It is a timer relay countdown off module with high , stable and reliable performance. Trigger to connect, and disconnect after delay time; if trigger during delay time, it disconnect immediately. Normally the module 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 show the delay time. Voltage: DC12V Load Capacity: 10A 250V AC; 10A 30V DC Delay Time: 1~99Sec./1~99Min.(adjustable) Color: Green Material: PCB+Components Package Contents: 1 x Timer Relay Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.