The new 5V Relay Module

Can be used as microcontroller development board module can be used as home appliance control

5 V-12V to TTL control signal

The control signal DC or AC, 220V AC load can be controlled.

There is a normally open and one normally closed contact

A power indicator light

A control indicator, pull off, disconnect does not shine

Transistor drive to increase the relay coil control pins high impedance.

The control pin has a pull-down circuit to prevent malfunction relay vacant