Realize high-frequency, fast and frequent on-off of the circuit, and switching . The on-off process will not noise, no electrical , and no electromagnetic interference. The service life is than of common electromagnetic relays. Adopt dual MOS -connected active output, lower internal resistance, larger current, strong power, 15A, 400W at room temperature, which meets the use of equipment. It is often used to control motors, light , LED strips, DC motors, -water pumps, solenoid valves, etc. Through this module, these devices can be easily controlled, which is very convenient. Name: Relay Module Working voltage: 6-30V Dimensions: 6x3.4 x1.2cm color: blue Material: PCB Package Contents: 1 x Module Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.