The design and features of the optics allow for a wide range of applications. Heat sources can be displayed in different viewer colour modes and digitally magnified if required. Image data can be transmitted via cable and, depending on the version, transferred live to an Android or iOS end device via WiFi function and recorded. The Keiler are IP66 certified and thus protected against dust and rain. Products of the Pro series are equipped with a powerful VOx detector. All Keilers have 17 µm pixel pitch and an LCOS display. The internal rechargeable battery allows a continuous operation time of min. 4 hours, additionally the Keiler can be operated as well as charged via an external USB power source. The frame rate is 50 Hz for all optics.