Features: 1. After power-up, when there is an external trigger signal, the module start delay, and outputs a signal, when delay time over ,the signal output end. 2. Adjustable delay time (0-120 seconds). 3. With led light indicates the output level. 4. Can connect relay module ,achieve to control large current work status. 5. With input power indicator. 6. On-board test button, you can use IT as a trigger button. Specification: Condition: 100% Brand New Input: VCC: 5-12V GND: Ground IN: Trigger terminal: high level effective Output: OUT: output signal, when no trigger is low level, after triggered is high level,restore the low level after the delay ends GND: Ground Working Voltage: 5-12V Size: 40x20mm Package Includes: 1 x Adjustable NE555 Module