1. the realization of high-frequency circuit fast and frequent , number of switching.2. the on-off process does not generate noise, no electrical , no electromagnetic interference.3. service life than commonly used electromagnetic relays.4. using double MOS parallel active output, lower internal resistance, higher current, strong power, 15A at room temperature, 400W, which meets the use of most equipment.5. often used to control motors, light , LED strips, DC motors, Mini pumps, solenoid valves, etc., through this module, you can easily control these devices, very convenientTrigger timing Delay switch circuit Dual MOS tube control board of relay module 12V 24V0.1sec(min)~999min(max) continuously adjustableThis product is easy to use, , please look at the detailed instructions for the operation of this product, very practical .Colour:As ShownMaterial:PCBPackage Contents:4 x delay switch moduleOnly 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.