SMAKN&reg; Wide voltage 5V-30V Power Supply Adjustable Trigger Delay Time Relay Module Operating voltage: 5V-30V (wide voltage) Both Micro USB and welding power supply interface terminals Modules can be controlled: 10A 250VAC (AC), 10A 30VDC (DC) below the load. Dimensions: 54mm *19mm * 18mm (L * W * H) Weight: 16g