AIR-ZENITH 220PSI digital air pressure gauge.
 ■ Comes with 1 pressure sending unit.
 ■ Gauge display: 0 to 220 PSI (factory default)
 ■ The meter can be mounted in any 2-1 / 16 "(52mm) diameter hole with the included mounting bracket.
 ■ By adding an optional SPDT (Single Pole, Double Throw) switch between 2 pressure sending units, 1 pressure gauge can read from 2 air sources.
 ■ NOTE: The gauge display will flash on and off as a warning when air pressure exceeds 220 psi. This feature cannot be disabled as a security feature.
 ■ Additional feature: This meter will check and display your system voltage for the first 30 seconds.