Equalizer® PowerPump™ plunger eliminates manual pumping of your Visual Vacuum Cups or Wood’s Powr-Grip Vacuum Cups. Replace the original plunger in your cup with the PowerPump™, press the button, and let your cup automatically draw down. The PowerPump™ is designed for a minimum of 5 hours of constant run time (3400 mAh) and can be used as a manual pump if your battery needs to be recharged. Features a battery light indicator (turns red when battery is low). Includes 1 USB-C charging cord.