The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent.

RPi Relay Board Features
Standard Raspberry Pi 40PIN GPIO extension header, Supports Raspberry Pi A+/B+/2B/3B/3B+/4B and later versions
High quality relays, loads up to 5A 250V AC or 5A 30V DC
Photo coupling isolation, prevent interference from high voltage circuit
Onboard LEDs for indicating relays status
Relay control jumper, allows to control the relays by custom pins other than the default pins
Comes with development resources, including examples in wiringPi, WebioPi, shell, python, and bcm2835

Package Contains:
RPi Relay Board × 1
RPi screws pack (2pcs) × 1

For more resources you may need, pls contact me via Amazon message, i will send you then via attachment.