11 Selectable Units of Pressure - Accuracy: /- 0.3-Percent FSO (25-Degree C) - Operating Conditions: 32-Degree F to 122-Degree F (0 to 50-Degree C).Gauge/Differential Pressure - Repeatability: /- 0.2-Percent (Max /- 0.5-Percent FSO).Auto Power Off - Linearity/Hysteresis: /- 0.29-Percent FSO - Power Supply: 9V Battery (Included).Display: Dual LCD with Backlight - Data Hold - Maximum Pressure: 150 PSI - Low Battery, Over Range, and Under Range Indicators.Response Time: 0.5 Seconds (Typical) - Included Accessories: Soft Pouch, Flexible Tubing, 1/8'' MPT x 1/8'' Barb Access Filling The PDMM15 is a digital manometer, used for measuring pressure. Get accurate measurements every single time. Select from up to 11 different measuring units to get what you need. This unit can measure both gauge and differential pressure. It has a dual LCD with backlight, so it works great even in poor lighting conditions. Maximum pressure: 150 PSI. A soft carrying pouch and flexible tubing are included. A 9 V battery is included.