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Check the listing for details. 10pcs DC 5V 1 Channel Relay Module Switch Board Optocoupler Is Color: 5V-10pcs. Condition: New. Listed at 24.99 USD. Maximum load capacity: AC 250V/10A, DC 30V/10A. Opto-isolator trigger current: 5mA. 10pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger.