< ul >< li > No Overload Any More - If the tool motor connected to the ' Ⅰ ' port exceeds 27 . 5W , the vacuum connected to the ' Ⅱ ' port will automatically delay 0 . 5s to turn on , which helps prevent circuit overloaded by large current if tool and vacuum power - on at the same time . NOTE : The current sum of the tools used on " I "+" II " should not exceed 15 amps . Pls check if it fits before buying .< li > 0 . 5s Auto Delay Control for the Vacuum On - The shorter the delay , the faster your vacuum will work , the cleaner your home will be . Automatic delays 0 . 5s to turn on the vacuum when you start your tool , which is more fast than other switches in the market . Why not make your home a little cleaner ?< li > 5s Auto Delay Control for Vacuum OFF - When you turn off your power tools , delays 5s to turn off the vacuum . After careful calculation and investigation , we find that 5S is enough to completely clean up your Inlet tube when you complete your work . So just saving your time , energy and electricity .< li > Premium Material Makes Extreme Durable and Safe - UL - certified 14AWG power cord which is US standard . Control box covered with full ABS V0 grade flame retardant material , more safe and reliable .< li > Wide Compatibility - Our automatic vacuum switch has a starting threshold of approximately 0 . 25 amps ( 27 . 5watts at 110V ), perfectly suited for medium - sized work loads such as most Miter Saws , Table Saws , Power Sanders and Routers , and extend the life of your vacuum .< li > NOTE : " I "+" II " current should not exceed 15 amps , otherwise it is easy to overload . Please read the manual carefully before use to know the power range of the switch .< br >< div > < div > < h2 > Product Description < div > < div > < div > < div > < table > < tr > < td > < div > < h4 > Power Light for Better Use < p > Our Automatic Vacuum Switch adopt a green power light for better and safer use.