Description:25A SSRInput Voltage:3-32VDCInput Current:DC3-25mAOutput Voltage:24-480VACCurrent Rating:25AOutput:TriacOn Voltage:1.5VOff Leakage Current:2mAOn-off Time:10mSDielectric Strength:2500VACInsulation Resistance:1000M/500VDCAmbient Temperature:-30~+75 Switch method:zero-cross turn onDimension:2.25 x 1.75 x 1.25 (inch) , 57 x 32 x 45 (mm)Weight:90gIt's for switching AC power source from 24V to 480V. The control signal is 3-32V DC. Please note it needs a heatsink to work with it.Color: picture colorMaterial: PC + metalPackage Contents: 1*Single Phase Solid State RelayNote: To test an SSR, the easiest way is to use a bulb. Please check the following video. A multimeter won't help since there's a small current leakage even if the output of the SSR is open.Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.