Download the testo APP Refrigeration to your Smartphone / Tablet for free and make your everday work at AC/R Systems more comfortable. Features: • Remote view of your measured values on a Smartphone / Tablet • Track changes using the graphical trending function • Update the refrigerants in the instrument via the APP easily • Create .pdf or .csv (Excel) reports • Include a photo of the measuring location in the report • Send out reports via e-mail directly • Range of appr. 20 m (unobstructed field) using Bluetooth Low Energy The APP can only be used in combination with the manifold testo 550 or testo 557 (Generation 2015). The activation of the Bluetooth is carried out by pushing the up and down key on your manifold simultaniously.