Features 1.Better Control: Equipped with this timer relay module, you will find it much easier to control the on and off on your machine. 2.Simple Setting: Through the potentiometer, you can adjust the time between 0 and 25 seconds with high accuracy, very reliable. 3.Stable Working: There is a diode at the power end, which will prevent reverse connection as well as ensuring stable working. 4.Practical Uses: Can be used on robot, car lamp delay, intelligent product development, automation equipment, smart home, etc. 5.Easy to Install: 65mm x 16mm compact size together with a light weight brings more convenience to the installation. Specification Item Type: Timer Relay Module Product Size: Approx. 65 x 16mm / 2.56 x 0.63in Working Voltage: 12V Module Control: 10A 250V AC, 10A 30V DC load below. Time Setting: The time can be adjusted by the potentiometer and the default is 0-25 seconds. If you need a longer time, you can replace the larger capacitor or potentiometer yourself. Delay Time Formula: T=1.1RC. For example, capacitor 47uf resistor 500K T=1.1 x 500000 x 0.000047=25.85 seconds. Wiring: The power supply of the module has a diode to prevent reverse power supply, so you can connect with confidence. Package List 1 x Timer Relay Module