The new way to fill your vehicle's air conditioning system safely and accurately! Johnsen's EZ Freeze II temperature from the vent, the user will know the system is charged, is a 16 oz. can of refrigerant with a patenet pending RFID dispensing unit. The RFID Clip will connect wirelessly to the trigger and hose assembly allowing users to place the clip inside the passenger compartment's air vent while staying under the hood with the can. Once the Clip is reading the desired temperature from the vent, the user will know the system is charged.