Fieldpiece HG2K9 HG2 HVAC Guide System Analyzer All Seasons Pack all-in-one kit includes all of the accessory heads used with the HVAC Guide®System Analyzer to automatically input data. Test target and actual Superheat, Subcooling, find Target Evaporator Exit Temperature and perform and record a Combustion Analysis asily and efficiently with this kit. The Fieldpiece HG2K9 also includes the ACH4 amp clamp to take amp draw readings directly with the HG2 for the CheckMe! test. The Fieldpiece HG2K9 all comes in the ANC3 Large Briefcase Style bag with room to add to your kit as new tests for the HVAC Guide are developed.