Feature: 1. KPa, mmHg, InHg, Psi, Mbar, Bar, Ozin², Kgcm², InH₂O, FtH₂O, CmH₂O are available in multiple units, which can meet the needs of different industries in different countries. 2. It is suitable for measurement and on‑site inspection of ventilation and air conditioning systems, clean room, or troubleshooting of any gas pressure system. 3. Large screen with backlight, easy to measure in dark environment, easy operation and clear reading value, easy to carry. 4. It is an indispensable measuring tool for HVAC technicians, operation and maintenance engineers and scientific researchers. 5. Can measure the maximum, minimum, average, and deviation values, with data retention, it is a good helper for measuring pressure. Specification: Item Type: Digital Manometer Material: ABS Color: As shown in the picture Model: SW-512C Measuring Range: ±103.42KPa Accuracy: ±1% FS Maximum error 1.04KPa Maximum Pressure Limit: 206.7KPa Repeatability: ±0.25%FS Response Time: 0.5S Pressure Connection: 1/8in (3.18mm) quick connector Working Temperature and Humidity: 0℃-40℃ 10%-80%RH Storage Temperature and Humidity: -10℃-60℃, 10%-90%RH Over-Range Prompt: Err1 or Err2 Power Supply: 3 x 1.5V AAA (not included) Reference Measuring range and resolution Model SW-512C Unit Range Resolution KPa ±103.42 0.01 mmHg ±775.7 0.1 InHg ±30,540 0.001 Psi ±15,000 0.001 Mbar ±1034.2 0.1 Bar ±1.034 0.001 Ozin² ±240.00 0.01 Kgcm² ±1.055 0.001 InH₂O ±415.20 0.01 FtH₂O ±34,600 0.001 CmH₂O ±1054.6 0.1 .How to Use 1: Install the battery (3x1.5V AAA dry battery is not included in this product). 2: Press the power button. 3: Connect the hose to the adapter and port, and connect the adapter to the place where the air pressure needs to be tested. 4: According to the unit needs of different regions, press the UNIT unit conversion, DLF difference, recording mode, etc., press the button according to the demand. Package List: 1 x Digital Manometer(Battery Not Included)4 x Plastic Hose2 x Quick Connector1 x Bag1 x Instruction Manual Note: Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.