Features 【2 Modes】: The DC 12V delay relay module support 2 modes, mon mode(once) and cycle mode, and you can simply switch mode by adjusting the jumper. Connect 2 wires of “Key ”if you need module to work recurrently after power on. 【Main Function】: This timer switch module is great to control the reciprocating stroke, or repetitive power on and off for equipment and products burn-in test. 【Adjustable】: There are many voltage and time range for your choice, both "on" time and "off" time are adjustable, which is a cycle timer with high precision, stable and reliable performance. 【Widely Used】: Our delay on/off switch used in robotics, car lamp delay, intelligent product development, automation equipment, intelligent home, burglar alarm delay, and development of electronic. Widely used on timer operating equipment, machine repetitive test circuit, fish tank intermittent pump, etc. 【Service Guarantee】: We provide 24-hour after-sales service, if you have any questions about the relay module board, please feel free to contact us, we will try our best to solve your problem. Specifications: Type: DC5V,0-30min/DC5V,0-24hr/DC12V,0-120min/DC12V,0-24hr/DC24V,0-15min/DC24V,0-30min (Optional)Quiescent Current: <10mA Dynamic Current: 45mA@12V; 90mA@5V; 30mA@24VContact: 1 group NO+NC Load Capacity: 10A(AC0-250V, DC0-30V） Size: 70*20*18mm / 2.75*0.78*0.7" Time Accuracy: Max value*0.001 Mon. Mode:     1. The module Power-on, When triggered the relay is switched on, timer delay off.     2. When triggered on the delay process, again triggered, it will immediately interrupt the delay. Cycle Mode:     1. The module Power-on, When triggered the relay is switched on, (T1) timer delay off. (T2) timer delay        on. Such cycle. T1 and T2 are set by two adjustable resistors, respectively.     2. When triggered on the delay process, again triggered, it will immediately interrupt the delay. Package Includes:1 x Timer Relay Module Package List