Description:Convenient temperature measurement on refrigeration, air conditioning and heating systems – thanks to wireless connection to your smartphone or tabletFast identification of temperature changes by graphic progression displayMeasurement data analyzed and sent via testo Smart Probes AppProblem-free application at measuring points that are a long distance apart thanks to Bluetooth® range up to 100 mCombined with a smartphone or tablet, the testo 115i clamp thermometer is the ideal temperature measuring instrument for carrying out servicing and troubleshooting on refrigeration, air conditioning and heating systems, as well as for installing them. It can also be used to measure flow and return temperatures.Temperature – NTC Measuring range: -40 to +150 °C Accuracy: ±1.3 °C (-20 to +85 °C) Resolution: 0.1 °COperating temperature: -20 to +50 °C Storage temperature: -20 to +60 °C Accessories: Testo 115i clamp thermometer with smartphone operation