XS Scuba's Pressure Gauge is a highly accurate Bourdon Tube Designed Gauge with a Built-in Thermometer. Gauge has red highlighted readings from 0 to 500 psi for safety reserve air. Thermometer Needle is brightly colored for ease of reading and the entire gauge face is Luminescent for ease of reading in low light or night conditions. Gauge is equipped with a 36" High Pressure Hose and an impact resistant rubber gauge boot.