Adopts quality pressure sensor, high accurate ADC, and low consumption MCU. Indoor temperature measurement digital manometer with wide range, high resolution, and high measuring accuracy. Multifunctional with temperature and pressure measurement, data storage, low battery indicator, data hold, max/min value mode, DIF mode, and more. Features 12 selectable pressure units: mmHg, inHg, ftH2O, cmH2O, inH2O, Pa, kPa, mbar, bar, psi, kg/cm, and oz/in. Equipped with digital LCD display for clear reading. Measures real-time pressure quickly via single channel and detects pressure differences between two ports using dual channels. Suitable for ventilation and air conditioning systems, gas measurement, calibration, and general pressure system diagnostics. Product Name: Digital Manometer Display: LCD Battery: 1 x 6F22, 9V, 250mAh (not included) Pressure Measurement Range: 2.999 psi Accuracy: 0.3% FSO (at 25C) Data Storage Capacity: 100 readings Max Pressure: 20 kPa Units: Switchable Low Battery Indicator: 6.8V Auto Power Off: 15 minutes after inactivity Operating Temperature: 050C (32122F) Storage Temperature: -10 to 60C (14140F) Item Size: 159 x 76 x 32mm / 6.26 x 2.99 x 1.26in Carrying Bag Size: 180 x 110 x 30mm / 7.09 x 4.33 x 1.18in Item Weight: 260g / 9.17oz Color: Black + Orange Material: ABS Package Contents: 1 x Digital Manometer 2 x Tubes 1 x Adapter 1 x User Guide 1 x Carrying Bag Note: Light reflection and screen settings may cause slight color variation between the image and actual product. Measurement error allowance is +/- 1-3cm.