SEENGREAT 4 Channel Relay Module DC3.3V/5V with Optocoupler for Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B Loads up to 5A 250V, 40pin GPIO Interface

🔌 4 Channel Relay HAT for Raspberry Pi GPIO: 4-CH Relay HAT is designed with a standard 40-pin GPIO header, providing a compact 4 channel relay expansion board for Raspberry Pi Zero, Zero W, Zero WH, 2B, 3B, 3B+, 4B and 5 development projects. ⚙️ 5A Relay Module for Control Projects: This 4 channel relay module supports independently controlled relay outputs, with each relay rated up to 5A at 250V AC or 5A at 28V DC, suitable for GPIO control, automation testing and electronics prototyping. 🛡️ Optocoupler Isolation Relay Board: The GPIO relay expansion board integrates photo-coupler isolation to help reduce interference between the control side and relay side, improving stability for embedded control, lab testing and maker applications. 💡 Relay Status LED Indicators: Each channel includes an onboard relay status indicator LED, allowing users to visually check relay operating state in real time during Pi GPIO relay testing, debugging and project development. 🧩 Configurable GPIO Relay Control: Relay control jumper headers allow users to use default GPIO assignments or connect alternative GPIO pins with jumper wires, offering flexible control options for custom Pi relay module applications.