UEI EM201SPKIT STATIC PRESSURE KIT Dual input differential measurement to ±60 inches water column Triple Scale: inches water column (In-WG), mBar, and PSI MIN/MAX value capture Data hold Backlit display Ruggedized, including rubber boot with integral magnet Auto power-off 3 Year limited warranty  Dual Input Electronic Manometer (EM201) Magnetic Probe Tips 2(ASP1) Pressure Tubes w/ Brass Fitting 2(BF100) Battery (9V)