The RPi Relay Board (B) is an expansion board with 8-ch relays for Raspberry Pi
It gives your Pi the ability to control high voltage products such as home appliances.
Standard Raspberry Pi 40PIN GPIO extension header, Supports Raspberry Pi A+/B+/2B/3B/3B+/4B and later versions, Jetson Nano
High quality relays, loads up to 5A 250V AC or 5A 30V DC
Photo coupling isolation, prevent interference from high voltage circuit