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【Multifunction Timer Relay】Programmable delay modes to control the relay timings, extensively used at sensible home, industrial control, automated irrigation, indoor ventilation, protection equipment and so on 【Load Range】Operating voltage: DC 6V - 30V, help micro USB 5V power supply High point trigger: 3V - 24V NO(Normally open) maximum load < AC 250V/10A, < DC 30V/10A Timing range: zero ~ 999mins (continuously adjustable) 【Reverse Protection】Built-in a diode to supply defense opposed to unintentional reverse polarity for the circuits 【Sleep Mode】If no operation within 5 minutes, the electronic tube of the relay board will flip off robotically Pressing any button can wake it up 【Parameter Setting】OP(conduction time) / CL(off time) / LOP(circuit times) would be set individually, and the parameters are mutually independent All parameters are completely saved once set The purposes and parameters would be reviewed or replaced at a later time