Bosch 3931A-PB 120-Volt Wet/Dry Vacuum Cleaner
Bosch's 3931A-PB wet/dry vacuum cleaner has  4 modes of operation for maximum versatility: regular, power tool, Pulse-Clean, and Pulse-Clean with power tool. The power broker dial allocates power between vacuum cleaner and connected power tool to optimize usage and the exclusive pulse-clean electromagnetic filter cleaning system shakes the dual filter cartridges.