Robinair 34988 Premium Refrigerant Recovery, Recycling and Recharging Machine Fully automatic function lets you recover vacuum leak test charge and then walk away Combines simple operation with superior accuracy and recovers recycles evacuates leak tests and recharges quickly and accurately Fully automatic function program to recover vacuum leak test and charge without operating panel valves Automatic dye Inject gives the user the ability to use the machine to inject UV dye into a vehicle feets A/C system Automatic oil measure and inject will automatically determine how much lubrication oil needs to be injected back into the A/C system based on how much oil was taken out during recovery