Relay 4 Zero 4 Ch 3v Relay Board for Raspberry Pi from SB Components on Tindie
Eight Relays 4A/120V 8-Layer Stackable HAT for Raspberry Pi
Amazon.com: Coolwell Waveshare Raspberry Pi Relay HAT 3-CH Relay Board for Raspberry Pi Raspberry Pi 4B+ 4B 3B+ 3B 2B+ Zero W WH to Control High Voltage/high Current Devices : Electronics
Industrial 6-Channel Relay Module for Raspberry Pi Zero, RS485/CAN bus, power supply isolation, photocoupler isolation | RPi Zero Relay