NOYITO 2-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch (2-Channel Micro USB): Amazon.com: Industrial & Scientific
Amazon.com: HiLetgo 2pcs 24V Single Bistable Self-Locking Relay Module Push to Start and Stop … : Industrial & Scientific
NOYITO 30A 1 Channel Relay Module High Low Level Trigger with Optocoupler Isolation Load DC 30V AC 250V 30A for PLC Automation Equipment Control Industrial Control (1 Channel 12V): Amazon.com: Tools &
Timing Relay On Delay Function DC 24V & AC 24-240V Multi-Voltage Time Relay Delay Off Switch with 7 Function Choices: Amazon.com: Industrial & Scientific
General Purpose Relay, 55 Series, Power, 4PDT, 24 VDC, 7 A: Amazon.com: Tools & Home Improvement