This electronically driven automatic blast gate is an optional upgrade to the iVac Pro Wireless Dust Collection Control System, bringing one-touch simplicity to managing your dust collection airflow. Simply turn on your power tool, and the iVac Pro Tool (sold separately) sends a wireless signal to automatically open the Pro Blast Gate, and another signal to the iVac Pro Switch (#42897, sold separately), which turns on your dust collector. Turn off your power tool, and after a short interval to clear dust, the blast gate closes and the dust collector powers down. This automation prevents the irritating dust clouds that result from forgetting to open a blast gate, and the reduced suction that results from forgetting to close it afterward. Features: Prevents the irritating dust clouds you get from forgetting to open the blast gate Reduces the potential for accidents from reaching for blast gates while machines are running Optimizes the suction in your system by keeping a minimum number of gates open at one time Blast gate can also be controlled with the included toggle switch Up to eight blast gates can operate on one system