It"s built to perform for your professional tasks. Just add gasoline and squeeze the spray gun trigger to activate the PressuReady® Technology to get started. This technology is a battery-operated electric starting system allowing you to start without having to adjust the choke or pull the recoil rope. To save on fuel and reduce noise, the unit shuts off after a few seconds of inactivity. When you"re ready to get back to work just squeeze the trigger. The battery-operated PressuReady Smart Control panel is designed with a built-in LED diagnostic screen. This screen indicates the specific mode it is in such as: ready-mode, water flow, and alerts you with fault codes like no fuel and low battery. The battery compartment is water-resistant and accepts 20V MAX* batteries and is also compatible with DEWALT FLEXVOLT® batteries. **Battery sold separately.