Specification:Input Power Supply: 12V DCLoad Voltage: AC240V 2AMaximum operating current: 90mATrigger mode: high level / low levelInput control signal voltage:(0-2.5V low state relay OFF)(3.3-5V state high relay ON)Blue KF301 terminal connection control line is more convenient.Module interface:DC +: positive power supply (by relay voltage power supply)DC-: connect power negativeCH: Relay Module signal triggering end (Low level trigger effective)Note: Power must be DC voltage and need to be consistent with the voltage relayPackage Included:1x High Level / Low Level Relay