5V relay module KY-019

product description
1 blue and black metal 1 relay module 5V relay module KY-019 for Arduino 4 * 1.9 * 1.8cm
, With a fixed screw hole, easy to install
Color: blue, black
Material: Metal
Board size 1.8cm * 4.0cm * 1.9cm
Weight 15g;
Simple test instructions: The module input and output electrical insulation, corresponding to the correct voltage, simply plug the input pin (such as short circuit with VCC) to pull out the relay, do not pick or connect the low level (such as short circuit with GND Circuit) The relay does not work.
Package Contents: 1 relay module
Note: Light photography and different displays may cause items in the picture to differ in color from the real thing. Measurement tolerance is +/- 1-3cm.