Review on 🔌 PiRelay Expansion Board for Raspberry Pi A+/B+/2B/3B/3B+ Loads up to 240VAC/7A, 125VDC/10A - SB Components by Bobby Valadez

First impression is not very good. The first had a broken device on the back, its solder joint. The replacement is dirty and looks worn: the connector pins are bent, as are the jumpers. FYI: The markings on the jumpers don't match the markings on the pins. The jumpers follow the position of the pins on the header and I suspect the header markings are more based on the Pi's markings. It's recommended to do a simple continuity test before connecting.