4-Channel 5V Relay Module with Optocoupler Isolation (HW-316)
Take full control over high-voltage electrical appliances with complete safety and ease! The **HW-316 4-Channel 5V Relay Module** is the ultimate bridge between your low-voltage microcontroller projects and heavy-duty AC/DC appliances.
Whether you are building a smart home automation system, a greenhouse controller, or an industrial automation prototype, this module lets you switch up to four separate high-power loads simultaneously using standard 5V signals.