The handheld testo 549i smart wireless mini pressure gauge is suitable for air conditioning and refrigeration systems. It can be set up quickly and easily directly at the pressure connection point during maintenance, troubleshooting and installation. The testo 549i makes it easier to measure pressure connections at remote points. No hose is needed during measurement, reducing the loss of refrigerant caused by pipe connection. When wireless with testo 115i. When the mini pipe clamp temperature measuring instrument is used in combination, it can also calculate the parameters of the refrigeration system. The testo Smart Probe APP provides higher measurement convenience. The measurement readings can be conveniently viewed on your terminal device through the testo Smart Probe APP. In addition, the testo Smart Probe APP can also be used to automatically calculate evaporation and condensation temperatures. All measurement data can be displayed in the form of graphs or tables. System requirements:-iOS8.3 or higher-Android 4.3 or higher-Bluetooth 4.0. Measuring range: -1 +60 bar. Measurement accuracy: ±0.5% full scale. Resolution: 0.01 bar. Probe connection: 7/16 inch-UNF. Overload Relative pressure (high pressure): +65 bar. Pressure media: CFC, HFC, HCFC, N, H? O, CO? Operating temperature: -20 +50 °C. Storage temperature: -20 +60 °C. Battery type: 3 AAA batteries (Not included battery). Weight: 156.6 g. Dimensions: 125 x 32 x 31 mm. Testo 549i smart wireless pipe pressure measuring instrument. Immediately you paid for the order. Communication always is best way to solve problem. We accept any return in 30 days that we promise. If item is defect or wrong when it. Please never return the parcel without agreement. From us, it is no possible for us to get the parcel. We at strive to give all of our customers a 5 star service. As this helps us maintain a quality service. If you’re not satisfied with our goods or service, Please 4. Communication is very important, we believe we can resolve all the problem with you. It’s our pleasure to answer any questions you have. (weekend and holidays excluded). Testo 549i High Pressure Air Conditioning Refrigeration Gauge with Bluetooth.