The SMAN4 is a wireless digital manifold. With four ports and a built-in vacuum gauge, HVACR professionals can evacuate a system, pull a vacuum, add refrigerant, and dial in the charge at one time. There are three standard 1/4-inch ports and one beefy 3/8-inch port with the bore in the manifold being 3/8 inch throughout. The digital manifold wirelessly receives live indoor wet bulb and outdoor dry bulb temperatures, then calculates real-time target superheat and digitally displays both the target superheat and actual superheat on the large, backlit display, all while techs make adjustments outside at the condenser. It displays actual subcooling and superheat simultaneously. The system charge is adjusted while techs watch, in real-time, how the indoor wet bulb and outdoor dry bulb fluctuate and affect the target superheat - without having to walk away from the condenser. The SMAN4 can also wirelessly send six measurements (indoor wet bulb, outdoor dry bulb, suction line temperature, suction line pressure, liquid line temperature, and liquid line pressure) to the HVAC Guide(r) System Analyzer, Model HG3. The HG3 then combines the SMAN4 superheat and subcooling with airflow tests to take a snapshot of the entire system in real-time. Features include high and low alarms for micron levels, two-point pressure calibration, large digital backlit display, and front-facing hose seats to limit dirt and grime from entering the SMAN4.