This is a high-low level trigger 2-channel relay module that can control two loads. load capacity, the relay can connect to maximum 30A, 250V loads. Easy to use, designed with screw terminals for convenient connection. High or low level trigger can be by jumper. Four mounting holes are great for installation. Power Supply: AC100-250V Input Control Signal Voltage: 0-1V DC(low state relay), 1.5-5V DC(high state relay) Colour:As Shown Material:PCB Package Contents: 1 x 2 Channel Relay Module 30a Only the above package content, other products are not included. Note: Light reflection 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.