KNACRO DC 24V SLA-24VDC-SL-C DC 24V/AC 250V 30A dual relay module 30A two-way 2-way relay module optocoupler isolation Module operating voltage: DC 24V Normally open interfaces Maximum load: AC 250V / 30A, DC 30V / 30A Signal Indicator: 2, (pull lights) Size: 55 * 51 * 22 mm / 2.17 * 2 * 0.87 in(L * W * H. Weight:68g/2.34oz.