The process of downloading the Testo 875 Thermal Imager Firmware 1.56 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Testo 875 Thermal Imager Firmware 1.56 driver from the primary server - this is the manufacturer’s Testo official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Testo 875 Thermal Imager Firmware 1.56 diver.