DollaTek 5Pcs NE555 12V DC Adjustable 0 10 Second Timer Delay Relay Switch Module Shield for Arduino Raspberry Pi

With power indicator LED (red) and trigger indication LED (blue) Output is voltage free & can be connected up to 10A load.Input voltage:DC12V.Stream with relay protection Chrono-potentiometer regulation time delay, adjustable from 0 to 10 seconds by default Useful for applications in equipment-delay to prevent sudden high current which can burn components and devices.Max.loading:2200W