The dual-channel relay module is more or less the same as a single-channel relay module, but with some extra features like optical isolation. The dual-channel relay module can be used to switch mains powered loads from the pins of a microcontroller.
Supply voltage – 3.75V to 6V Trigger current – 5mA Current when relay is active - ~70mA (single), ~140mA (both) Relay maximum contact voltage – 250VAC, 30VDC Relay maximum current – 10A