Features: It is a timer relay module with high precision, stable and reliable performance. 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. There are many voltage and time range for your choice, both "on" time and "off" time are adjustable. Widely used on timer operating equipment, machine repetitive test circuit, fish tank intermittent pump, etc. 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@24V Contact: 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