STANLEY J45C09 450 Amp Jumper with Compressor 900 Peak Battery Amps / 450 Amp Instant Starting Power Includes a 120 PSI air compressor, DC & USB charging plugs and a high powered LED light that rotates 270 degrees Consists of reverse polarity alarm for safety along with a top-mounted rubber molded handle for easy grip Impact resistant injection molded housing Contains power/charge indicator and audible & visual reverse polarity alarm