Easily cleans most fuel injectors Base Kit does not include any injector connector pigtails (available separately) Will flush and back flush injectors for best possible cleaning process No compressed air required For best results use Motion Pro Fuel Injector Cleaner 15-0004, its specifically formulated not to harm O-rings and other fuel injector moving parts Push button switch to turn fuel injector on with LED battery condition indicator light Durable anodized billet aluminum construction Built tough for everyday shop use 9 volt battery included Patented Design