This is a very handy programmable timer module with 4 different programmable modes. The 3 digit display show the countdown. Small, compact and easy to setup. 

• Supply Voltage: 12V or 24 DC
• Trigger Voltage: 4 - 20V DC
• Model Number: YYC-2
• Standby Current: 20mA
• Load DC 30V 5A or AC 220V 5A
• PCB Size: 64 * 35 * 18mm

• After Power ON, press Function key K1 for 2 seconds.
• Pressing K1 will step through 4 program modes, P-1, P-2, P-3 and P-4
• Press K2 to Enter into the mode. Once in the mode press K2 to select digit
• Press K3 to step through values 0-9

Modes

• P-1: On Trigger, the relay close and countdown timer start, when time is up, the relay open. 
• P-2: On Trigger, countdown timer T1 start, after T1 seconds the Relay close, timer T2 start countdown, after T2 sec relay close
• P-3: Loop Mode, when timer T1 finish countdown, Relay close, when timer T2 finish, Relay open and process repeat itself. User can set T1 and T2
• P-4: On Trigger Relay open, when Trigger is removed, countdown start, Relay closes when the time is up