The compact kalte-set contains the High Pressure meter testo 549 i as well as the pliers thermometer testo 115 i (each in two compartments version). In combination with a smartphone or tablet, it is ideal for the service and the search for faults in air-conditioning and refrigeration systems, as well as for their installation. Both measuring devices can be quickly and easily directly at the pressure connection or the temperature measuring point. When working on far apart measuring points facilitate the application considerably - thanks to wireless connection to the smartphone or tablet. The measured values of both devices via Bluetooth ® connection on the device installed app sent and can thus be easily read. In the app can be measuring parameters (such as Temperature or pressure) with only one click in the order exchange, delete or add. In addition, as fast as possible to change the displayed measured variables. The app also enables the automatic calculation of evaporative and liquefa