2pcs DC 24V Relay Module 2 Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger

The quality is good and they work as advertised. Can't go wrong at this price

A good little relay that easy fits in a single gang surface box.

I've only given this unit 4 stars because it's a replacement for an identical product I bought two years ago which has stopped working after only modest use, however while it was working it worked extremely well.

Works perfectly, used to switch polarity of toy train track to have train continuously go back-and-forth on a short run of track.. and why not ?

I used this product as an interface between a photoelectric sensor and an indicating beacon. The sensor output wouldnt have the power to drive anything substantial so I added the relays to allow uprating the switching ability of the sensor. The driven beacon has 2 lights and a buzzer. This relay could drive upto 230v 10AMPs so could be used to stop and start a hoover with a current sensor etc to get automatic stop start of a hoover with 230v power tools etc. The ideas are endless. I use the 2 relays to seperate the light control and buzzer control for my little project.

very easy to use

Nothing

Item is as described, works exactly as hoped, i did have to google for the instrcutions to be sure i was using it correctly, otherwise it would have been 5 stars