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This pack contains 2 pieces of 8-Channel 5V Relay Modules, ideal for switching AC and DC loads using microcontroller signals. Each module can control 8 devices independently, making it perfect for projects requiring multiple outputs like smart home systems, automation, or robotics. Each relay supports switching up to 250V AC or 30V DC at 10A. The modules feature indicator LEDs, transistor drivers, and opto-isolators for safe and reliable performance with development boards like Arduino, NodeMCU, and Raspberry Pi. Key Features: - 8 independent relay channels - Low-level trigger input - Relay capacity: 10A @ 250V AC / 10A @ 30V DC - Opto-isolated inputs for safe microcontroller interface - Transistor driven (8550) - LED indicators for each relay and power - Screw terminals for high-voltage connections - Fixed bolt holes for easy mounting Specifications: - Operating Voltage: 5V DC - Trigger Voltage: 5V - Trigger Current: ~20mA per channel - Switching Voltage: Up to 250V AC / 30V DC - Switching Current: 10A Max - Board Size: Compact 8-relay layout - Operating Temperature: -40°C to +85°C Applications: - Smart Home and IoT Projects - Multi-device switching and control - Industrial Automation - Robotics and Engineering Prototypes - STEM and educational electronics projects - DIY electronics and maker kits Package Includes: - 4 x 8-Channel 5V Relay Module Note: Designed for educational, hobby, and prototyping use. When working with high voltages, ensure proper insulation and safety precautions. This module is suitable for interfacing with 5V logic microcontrollers only.