SMAKN&reg; DC 12V Multifunctional Timer Voltage Detection Digital Delay Relay Switch Module DC12V relay coil input. Power supply: DC 10-15 V (with 12V relay). Contact form: a set of conversion (normally open normally closed). Contact load: 10A / 30VDC, 10A / 277VAC resistive. Contact resistance: 50m (6VDC 1A).