The compact refrigeration set contains the testo 549i high-pressure measuring instrument and the testo 115i clamp thermometer (each in duplicate). In combination with a smartphone or tablet, it is ideal for servicing and troubleshooting air conditioning and refrigeration systems and for their installation. Both measuring devices can be quickly and easily attached directly to the pressure connection or temperature measuring point. When working at remote measuring points, they make the application considerably easier - thanks to the wireless connection to a smartphone or tablet. The measured values from both devices are sent to the app installed on the end device via a Bluetooth connection and can therefore be read conveniently and flexibly. In the app, measurement parameters (such as temperature or pressure) can be swapped, deleted or added in sequence with just one click. It is also possible to change the displayed measured variables just as quickly. The app also enables the automatic calculation of evaporation and condensation temperatures. All measurement data is displayed either as a diagram or in tabular form. Finally, the measurement data log can be sent directly by email as a PDF or Excel file. The measuring instruments can be conveniently transported in the handy testo Smart Case and are always with you when you need them.