The infrared thermometer testo 805i functions in combination with a smartphone or tablet as a compact measuring device for wall temperatures as well as safety and component temperatures of air conditioning systems. The measurement point is clearly marked with a laser circle made up of multiple points. Users can conveniently read their measurement values via the testo Smart Probes app installed on their device. The app also allows users to create and document images that include temperature values and laser markings. Additionally, the detection of mold-prone areas is simplified through a dedicated measurement menu. Finally, measurement data logs can be sent directly as PDF or Excel files.