With the DXAEJ14 Jump Starter with Digital Compressor and USB Power Bank, you no longer need to dread roadside emergencies when your vehicle won't start. This compact, portable device will test your alternator to make sure it is in proper working order and delivers serious jump-starting power with 1600 peak amps. That's enough power to jump-start a 12-Volt AGM, GEL or WET battery up to a V8; all without the need to use another vehicle for assistance. Simply connect the clamps to the battery, turn on the switch, and start your vehicle. The reverse polarity alarm will alert you when there is an improper connection. 15W USB-a and 25W USB-C power to charge devices on the go. A high-powered LED light and LCD screen readout with real-time information helps you work in the dark. This jump starter is equipped with a digital 120 PSI air compressor with AUTOSTOP™ and Sure Fit® nozzle to help inflate tires, sports equipment and more. For optimal performance, the unit should be charged every 30 days when not in use. Once used, the unit should be charged immediately overnight.Metal powder-coated clamps for durability.