The HART 20V Dual-Function Inflator is an excellent addition to any tool collection or car emergency kit. Pump your car tire from flat to full in under 4 minutes or fill your twin air mattress in under 45 seconds with 0-150 PSI (Pounds per Square Inch). This inflator features an auto-shutoff for hands-free use and an onboard LED light to enhance visibility in roadside emergencies. This inflator has a digital gauge allows for precise pressure readings in low-light situations. Due to the high volume and pressure this inflator can provide, this tool is perfect for automotive and in-home use no matter what you need to inflate, from car tires to air mattresses and pool toys! This inflator comes with multiple accessories, including a high-pressure air hose, high-pressure nozzle, presta valve attachment, sports needle, high-volume hose, and pinch valve nozzle. This bundle includes (2) 4.0Ah Lithium-Ion Batteries and a Charger. Hands free inflation with auto-fill shutoff Precise pressure readings with digital gaugenbsp; Inflates a twin air mattress in under 45 seconds Multi-use functions with high-pressure and high-volume inflation Convenient on-board accessory storage. On-board LED light for assistance in roadside emergencies Works with all HART 20v batteries. This bundle also includes (2) 4.0 Ah batteries, which provide 4x runtime versus the 1.5Ah