Review on 🔌 Weewooday Channel Optocoupler Isolation Expansion: Enhancing Signal Integrity and Protection by Tyler Born

They are fine, delivered as seen in the photos. With this or other devices, just pay attention to the size of the circuit board if that bothers you. I'm trying to use some of these for home automation and there are a few options that take up less space than this board. I would rather have the screw terminal and jumper on the low voltage side that are optional in the kit. So you can omit them if you'd rather solder the wires directly to the board instead. This would make the device much lower on this side. This allows you to use two relays in a little more space than one currently occupies (face to face, upside down, with low voltage wires out the middle and high voltage AC inputs at the ends).