1It is a timer relay module with high precision, stable and reliable performance 2It support reverse input protection and comes with a trigger button switch 3Power on and press the trigger switch to turn on load, and turn off load after delay time 4The time range is from 1 second to 10 seconds adjusted by potentiometer; if you need longer time, simply replace a larger capacitor or potentiometer 5Widely used on timer operating equipment, robots, intelligent product development, automation equipment, PLC development, smart home anti-theft alarm delay, electronic development, etc Features: It is a timer relay module with high precision, stable and reliable performance. It support reverse input protection and comes with a trigger button switch. Power on and press the trigger switch to turn on load, and turn off load after delay time. The time range is from 1 second to 10 seconds adjusted bypotentiometer; if you need longer time, simply replace a larger capacitor or potentiometer. Widely used on timer operating equipment, robots, intelligent product development, automation equipment, PLC development, smart home anti-theft alarm delay, electronic development, etc. Specifications: Load Capacity: 10A 250VAC, 10A 30VDC Size: 67.6*19.2mm / 2.66*0.75" Quantity: 1 Package Includes: 1 x Timer Module