About This MULTIFUNCTIONAL: Professional automotive air conditioner 134A 1234YF compressor A/C injector kit for injecting oil and dye through low pressure suction side into the air conditioner compressor. Includes extra 2 pieces low side oil checker WIDELY COMPATIBILITY: Comes with extra couplers for connecting with automotive 134a and 1234yf blue port, hose fitting feature 1/4 inch female and great for R410A HVAC system. Capacity: 1/4 oz/7.5 ml---2 oz/60 ml EASY OPERATION: To inject dye or oil, simply connect the injector to the low side of the A/C system and twist the handle until you reach the desired amount. Novice can do it independently LONG LASTING: Hand turn body was built by light but compact aluminum alloy, thickening hose with heavy-duty brass couplers for safe and smoothly connection REFINED CRAFTSMANSHIP: Knurled handle ring is designed to be aesthetically pleasing and non-slip, allowing for easy and precise rotation. Superior sealing performance, quick oiling and leak-free use increase convenience and efficiency with every use Overview Brand : Lichamp Voltage : 12 Volts Recommended Uses For Product : Air Conditioner Power Source : Manual Winding Special Feature : Automatic Shut-Off