The Observer 320 TM-X is quite possibly the best value thermal imaging camera on the market. Packed with features normally found only in scopes priced up to triple the amount, the 320 TM-X allows professionals and dedicated hobbyists a more affordable opportunity to enter the thermal imaging world. With a refresh rate of 50Hz and an impressive 384 x 288 raw sensor resolution and 640 x 480 digitally enhanced output resolution, the resulting smooth images are similar to cameras costing several times more. The 25mm Germanium lens captures video which can be digitally magnified with a press of a button for 2x zoom. The polarity of display images can be changed between white (hot) or white (black) or you can choose between 8 other full or partial color scheme display options. Settings allow the user to view an onscreen reticle and activate a live, object motion tracking square. Equally impressive, the camera accepts an removable SD card for several hours of recording and the video signal can also be exported through RCA or USB cables. The Observer TM-X runs on 9v DC power or 4 (AA) batteries.