1. Full ABS cover power module: control box adopts full ABS V0 flame retardant material, more safe and reliable. The surface is matte texture with excellent scratch resistance and corrosion resistance. 2. Ul-approved 14AWG power cord: American standard and allows high current over 30A. More durable, high quality materials ensure extreme long life. 3. No overload: if the tool motor connected to port �� exceeds 27.5W, the vacuum connected to port �� will automatically delay the connection for 0.5s to prevent the circuit from overload due to high current when the tool and vacuum are connected at the same time. 4. 0.5s automatic delay control vacuum on: The shorter the delay, the faster your vacuum works and the cleaner your home will be. When you start your tool, the automatic delay of 0.5s opens the vacuum, which is faster than other switches on the market. 5. 5S automatic delay control vacuum closing: When you close your power tools, delay 5s vacuum closing. After careful calculation and investigation, we found that 5S is enough to completely clean your intake pipe by the time you've finished your work. This saves you time, energy and electricity. 6. Wide compatibility: Our automatic vacuum switch has a starting threshold of about 0.25 amperes (27.5 watts at 110 VOLTS), perfect for medium workloads such as most miter saws, table saws, power saunders and routers, and extends your vacuum life. 7. Power supply for better use: Our automatic vacuum switch uses green power lamp for better and safer use. As soon as the power is on, the light will turn green, reminding you to solve the energy waste