Guide TU thermal imaging riflescope retains the appearance of a traditional daylight scope and perfectly integrates the latest premium thermal imaging technology. The design of this scope accommodates the long-term operating habits of hunters. TU series adopts 400×300 high-sensitivity thermal detector with three different lens options of 25mm, 35mm, 50mm, and its 10 sets of zero calibration configuration make it convenient to switch between different instruments.