4-Pack 12V 4-Channel Relay Module with Optocoupler Isolation, High Low Level Trigger for Arduino DIY Electronics Projects, Compact 73x50mm Board

4-Pack 12V 4-Channel Relay Module with Optocoupler Isolation, High Low Level Trigger for Arduino DIY Electronics Projects, Compact 73x50mm Board

• 4-Piece Set Includes All Modules: Contains 4 identical 4-channel 12V switch modules - no need to order separately, perfect for multi-circuit projects or backups.
• High-Low Level Triggering Flexibility: Supports both high-level and low-level signal input, giving makers precise control diverse DIY electronics applications.
• Optocoupler Isolation Protection: Built-in optocouplers electrically isolate control circuits from load circuits, helping safeguard sensitive microcontrollers like and Pi.
• Compact 73x50mm Layout: Space-efficient design fits neatly inside enclosures, robot chassis, or PCB mounts while keeping all terminals fully accessible.
• 12V DC Wide Compatibility: Engineered for stable 12V operation - works seamlessly with common power supplies, automotive systems, and industrial control setups.