Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Product Description: _x005f_x000D_ Description: This is a USB controlled relay opto-isolator board with 16 SPDT relays. You can use it for simple on/off switching electrical devices - home lights, DC motors, solenoids, etc. It can help you build projects such as robots and home automation. Jumper cap description: USB power supply when the jumper cap is connected. After removing the jumper cap, you can use an external power supply. When using USB power supply, the minimum current of USB power supply is greater than 1.5A. _x005f_x000D_ Zone 1 Relay module _x005f_x000D_ Zone 2 Output normally open/normally closed terminals _x005f_x000D_ Zone 3 Power input _x005f_x000D_ Zone 4 Select external power supply or USB power supply _x005f_x000D_ Zone 5 Serial terminal _x005f_x000D_ Jumper cap description: USB power supply when the jumper cap is connected, and external power supply when the jumper cap is removed. _x005f_x000D_ When using USB power supply, the minimum current of USB power supply is greater than 1.5A. _x005f_x000D_ Technical specifications: _x005f_x000D_ Maximum load: 10A/250V _x005f_x000D_ Product power supply: DC7V~38V _x005f_x000D_ Product size: 160.00x80.00x20.00mm _x005f_x000D_ Product size: 6.3x3.15x0.79inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ 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! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Serial Relay Module 1. Multi-Channel Control: The serial relay module features 16 channels, allowing you to control multiple relays simultaneously. This makes it an ideal choice for complex projects requiring extensive relay control. 2. Wide Voltage Range: The usb power supply development board operates within a wide voltage range of 7V to 38V DC. This flexibility ensures compatibility with various power sources and enhances the versatility of your projects. 3. High Load Capacity: Each channel of the usb relay board is designed to handle high load capacities, withstanding significant currents and voltages. This robust performance makes it suitable for demanding applications. 4. Reliability and Stability: The usb relay switch is built with high-quality relays and electronic components, ensuring exceptional reliability and stability. This guarantees long-term performance and reduces the risk of failure in critical applications. 5. Simplified Circuit Design: Utilizing a relay module can significantly simplify your circuit design by reducing the number of components and complexity. This makes the development process more efficient and less prone to errors.