Feature: 1. Relay Modules: Full SMD component with reasonable drive circuit design, which uses 8050 transistors to drive the electrical action. 2. Practical Use: Can be used not only as a single chip microcomputer development board module, but also as a home appliance controller. 3. Better Design: Simple to use, each group of outputs is a simple 3 wire structure, and there are also 6pcs output terminal reserved. 4. Reliable Work: The input is directly connected to the IO port of the single chip microcomputer or the digital circuit, the input high level relay is pulled in, and the input low level relay is released. 5. Easy to Install: There are fixing screw holes, so the installation is very easy, and the module size is 34 x 22 x 17mm. Specification: Item Type: Relay Module Output Drive Capacity: 250VAC 10A, 125VAC 10A, 30VDC 10A, 28VDC 10A. Module Size: Approx. 34 x 22 x 17mm / 1.34 x 0.87 x 0.67in. Package List: 5 x Relay Module Note: The input and output are electrically isolated. After the correct voltage is supplied, just connect a high test level (such as short circuit with VCC) to the input pin header to make the relay pull in, not connect or connect to a low level (such as short circuit with GND), and the relay does not operate.