Specifications:

Package Included：
2* 5V 1 Channel Relay Module

Module description:
Operating Voltage: This relay module operates efficiently at a 5V input voltage, ensuring compatibility with a wide range of microcontrollers and power supplies.
Fault-Tolerant Design: Engineered with robust fault-tolerance, this module ensures the relay remains inactive even if the control line is disconnected, providing enhanced reliability and safety.
Indicator Lights: Equipped with clear visual indicators, a green light signals power status while a red light indicates relay activation, making monitoring straightforward.
Module Size: Compact and easy to combine, this module measures 50mm in length, 26mm in width, and 18.5mm in height, fitting snugly into tight spaces.

Interface:
-Input
VCC: Relay power provide+
GND: Relay power provide-
IN: Signal trigger input (High or Low Level Signal, select via jumper)

1. Use High Level Trigger
When ¡°IN¡± input High Level Signal, the ¡°NO¡± connect with ¡±COM¡±
When ¡°IN¡± input Low Level Signal, the ¡°NC¡± connect with ¡°COM¡±
2. Use Low Level Trigger
When ¡°IN¡± input Low Level Signal, the ¡°NO¡± connect with ¡±COM¡±
When ¡°IN¡± input High Level Signal, the ¡°NC¡± connect with ¡°COM¡±
3. High or Low Level Trigger Select
Jumper connect with L, Low Level Trigger
Jumper connect with H, High Level Trigger

Features:

Relay module features optocoupler isolation, which provides excellent electrical isolation and protection against voltage spikes, ensuring safe operation when connected to microcontrollers.
Optimal for a wide range of applications, our relay module are perfect for home automation, automotive electronics, industrial control systems, diy electronics projects, robotics.

Note:

Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not reflect the actual color of the item.
Thanks for your understanding.