Feature Highlights: 1. 4-Channel 30A Relay Control – A development board built around the ESP32-WROOM-32E module, offering reliable switching for high-current devices. 2. Flexible Power & Full I/O Access – Supports DC 7‑28V or 5V input, with all I/O ports broken out for easy integration and prototyping. 3. Quick-Start Prototyping Tools – Comes with programmable buttons, LEDs, and relays onboard, helping you test and validate ideas faster. Ideal for IoT control projects. 4. Wireless Control Ready – Includes ESP‑IDF SDK code. Once programmed, you can remotely control the LEDs and relays via your smartphone, with features like Wi‑Fi setup and factory reset (contact support for code files). 5. Wide Development Compatibility – Works with popular tools like Arduino IDE, VSCode, and Tonny. Sample code for both Arduino and ESP‑IDF is available (contact support for details). Product Details: This relay board is designed for easy IoT integration and robust performance. Built with a durable PCB and supporting high-current relays, it simplifies automation projects for smart home, industrial control, or prototyping uses. The board arrives pre-configured for wireless control, allowing quick setup and customization. Specifications: - Name: 4-Channel 30A Relay Module - Color: Blue - Material: PCB - Power Supply: DC 7‑28V / 5V - Core Module: ESP32-WROOM-32E - Package Includes: 2 x Relay Module Kits Note: Product appearance and printed text may vary slightly by batch, but this does not affect functionality. Slight color differences may occur due to lighting or screen settings. Dimensions are approximate with a tolerance of +/- 1‑3 cm. Only the items listed above are included in the package.