The OTS-X is the latest in ATN's successful OTS thermal imaging line. It's rugged enough to use in the most difficult conditions, yet its compact and lightweight design make it easy to fit in a cargo pocket. One of the best features is its ability to interchange the objective lens so you can have multiple magnifications based on your needs. While other comparable thermal imaging systems may have close to the same quality as the OTS-X, this line is incredibly affordable at almost half the price. Features: Ergonomic DesignCompact Rugged ConstructionInterchangeable OpticsE-ZoomDigital Brightness ControlIcon Based Menu SystemBlack/White Polarity800x600 DisplayMade in US ATN OTS-X-E350 50mm 60Hz Thermal Imager TIMNOTSXE350