Features 1、High Frequency Fast On Off: Realize the circuit's high frequency fast and frequent on off. No noise is generated during the on off process. 2、Stable Working: The module works without electric sparks, works stably without electromagnetic interference. 3、Long Service Life: Delay relay module can replace the electromagnetic relay, and the service life is longer than that of the common electromagnetic relay. 4、Wide Range Of Applications: Relay module often used to control motors, LED light strips, DC motors, micro water pumps, solenoid valves, etc. 5、Adjustable Time Range: The module can be adjusted at any time from 0.01 second to 999 minutes, and the input voltage is DC 7~24V universal. Specification Package List 1 x Trigger Cycle Timer Delay Switch