In combination with a smartphone or tablet, the set is ideal for servicing and troubleshooting air conditioning and refrigeration systems, as well as for their installation. The Testo 549i and Testo 115i can be quickly and easily attached directly to the pressure connection or temperature measurement point. When working at measurement points that are far apart, they significantly facilitate application – thanks to the wireless connection to the smartphone or tablet. The measurement values from both devices are transmitted via Bluetooth to the Testo Smart Probes app on your device, where they can be conveniently and flexibly read. Additionally, the app allows for the automatic calculation of evaporation and condensation temperatures, as well as heating and cooling capacities. All measurement data can be displayed either as a graph or in tabular form. Finally, the measurement data report can be sent directly via email as a PDF or Excel file.