The heart of the iVAC Pro automated dust control system. Automatically turns on your shop vacuum or dust collector when you turn on a tool that is connected to the iVAC system via an iVAC Pro Tool Plus, an iVAC Pro Remote or iVAC Tool interface. Each iVAC Pro Switch can accept signals from up to 8 different tools to form a system. Up to 4 iVAC Pro systems can operate independently in the same workshop. 115V/20A.