Portable Pressure Calibrator (standard calibration) Works with Compressed Plant Air or Internal Pump Gauge, Differential and Vacuum Modes Measure and Generate Pressure from Vacuum (-80 kPa) to 2MPa (300 PSI, 20 bar) Pressure Measurement Accuracy of 0.025% Reading to ±0.01% FS Compatible with Fluke 700P Pressure Modules for Improved Accuracy Rugged Case Withstands Industrial Environment Internal Storage for Power Supply, and NiMH Battery