Relais Group 8 times

The design is neat, the optocoupler at the entrance still work even when the 3.3V from my STM32 clean. The screw terminals are meant to be used for one or two use because the contact plates are made of nickel-plated mild steel and break probably after a few paint back and forth bend. Absolute balderdash are the measurements in the description, with no idea what the measure in China. I have estimated the size of the terminal based on distance of 200mil and then ordered. The module is actually 138 x 56 x 20 mm in size. Otherwise, absolutely worth the money.