1/2 in 3/8 in & 1/4 in Ports Check valve protects vacuum when pump isnt running Ball valve isolates the pump for easy battery changes Gas ballast valve reduces frequency of oil changes Evacuate without generators or temporary power Saves time setting up and tearing down Up to 60 min runtime in Default Mode Large oil fill port eliminates funnels Low battery light notifies audibly and visually of low battery Up to 20 Percent Higher Air Flow vs Corded
