Relay module 5V 1 channel

Specification:

VCC: Power interface 5V
GND: Ground
IN: Control interface Drive Current at least 4mA
COM: Control circuit ground, Connect to GND
Size: approx. 41 x 16 x 16mm
Weight: approx. 12g

Note:  
 
1. High level flip-flops shows that there are trigger mode of the voltage between the signal input terminal and the ground; That is to say it is a way of short circuit trigger between signal input and VCC positive pole. 
2. Low level flip-flops shows that there are voltage for OV trigger mode  between the signal input terminal and the ground. In a word, it is a way of short circuit trigger between signal input and GND negative pole.
 
Package Included:
 
1 x 1 Channel Relay Module