Specification: Origin: Mainland China Type: Relay Condition: New Options: 1 x 5V, 1 x 12V, 1 x 24V, 2 x 5V, 2 x 12V, 2 x 24V           2-way 5V, 2-way 12V, 2-way 24V, 2-way 24V, 2-way 5V, 2-way 12V, 2-way 24V           4ch 5V, 4ch 12V, 4ch 24V, 6ch 5V, 6ch 12V, 6ch 24V           6ch 5V, 6ch 12V, 6ch 24V           8-way 5V, 8-way 12V, 8-way 24V           16-way 5V, 16-way 12V, 16-way 24V (optional) Module size: 75*55*18.5mm/2.95*2.16*0.73in Net weight: 61g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Relay Module 1. Wide Compatibility: This trigger board shield supports all microcontroller control, making it suitable for a variety of platforms such as 51/AVR/AVR/ARM. It can be used in industrial applications, PLC control, and home automation control. 2. High-Quality Relay: The trigger board shield uses high-current relays (AC250V10A DC30V10A), with independent wiring for the contact part, ensuring reliability. 3. Standard Interface: The relay interface board has a standard interface that allows it to be easily expanded on various development boards. It also has fixed screw holes for convenient installation. 4. Clear Indicators: The relay action indicators are clear, with illumination when the relay is energized and no illumination when it is not. There are 4 normally open and 4 normally closed contact points. 5. Convenient and Versatile: The blue KF301 terminal makes it easy to connect control wires. With its functional and stability testing, this relay module is a versatile solution for controlling a wide range of devices and loads.