Superheat and Subcooling Head for R-22 and R-410A, Measures Refrigerant Pressure and Temperature Simultaneously, Has a 1/4" Industry Standard Fitting for Actual Pressure, Needs a Pipe Clamp Thermocouple for Temperature, Working Range (Pressure): 0 to 500 PSI, Maximum Displayed Pressure:
800 PSI, Requires One 9 Volt Battery, Battery Not Included, Thermocouple Not Included