How it works: 
When the power is on, timer waiting triggering impulse -12V. Upon receipt of the impulse, relay turns on and remained in that position until the set time expires. After the time expires the relay is turned off and remains ready (waiting triggering pulse). 
If impulse remains more time, after the time expires the relay is turned off and will be activated when a have new impulse. 
LED indication for power is on and activated relay. 
The time is set by a trimmer potentiometer (1 to 30 seconds, minutes or hours). 
Time delay between 1 and 30 seconds, minutes or hours. 
- W1 closed, W2 closed - secounds. 
- W1 closed, W2 open - minutes. 
- W1 open, W2 closed - hours. 
Select seconds and adjusts the time. Then, if necessary, changes to minutes or hours. The selection is performed at power off. 
Fully assembled. 
PVC box included. 
Dimensions: 
- PCB only - 49 x 29 mm. 
- Box - 55 x 35 x 20 mm. 
The output, is relay with: 
- Normally open contact - NO. 
- Common contact - COM. 
- Normally closed contact - NC. 
Relay: 15А/125V DC, 15A/24V DC or AC, 10A/250V AC. 
Power supply - 10 to 14V DC. 
Current relay is turned off - 8mA, current relay is turned on - 48mA. 

This product is a boxed finished product.
It is also available as a fully assembled module (without box) - Product code 1606 (separate product).