The 4 channel 5V Relay module board is used to control high voltage and current load . It provides 4 relays for its use. It is good in safety with wide range of controllable voltage. It is Ideal for single chip microcomputer, household appliance control, etc. It has led indicator for power and status in-bulit. In this when jumper is connected to low pin the low level is trigger and when connected to high pin high level is trigger.
