2PCS Timer Relay Module External Trigger Delay On Off Switch Adjustable Timing Module.Feature: 1. Timer Relay Module: This module features high stability, accuracy and reliability; Power on and press the trigger switch to turn on load, and turn off load after delay time 2. Circuit Protection: Designed with reverse input protection and comes with a trigger key switch, this delay timer module protects against wiring errors while handling 10A loads 3. Adjustable Time Range: The time range is from 1