PRICES MAY VARY. PARAMETER --- operating voltage range DC 6-30V, support micro USB 5V power supply; timing range 0.01s~9999mins continuously adjustable. TRIGGER --- support 3.0v-24v high level trigger, 0v-0.2v low level trigger, switching value control. INDEPENDENT PARAMETERS --- able to set different OP, CL, LOP parameters which are independent and saved separately. SLEEP MODE --- without any operation for 5 minutes, the backlight of the relay board will turn off automatically. Press any button