The high-sensitivity Wahl Heat Spy a/z 150 Series Thermal Imaging Cameras have a 160-by-120-pixel detector for 19,200 individually calibrated pixels with a thermal sensitivity of ≤ 0.05°C to highlight even minimal temperature differences. The “z” Model features a 60-Hz frame rate while the “a” Model boasts a 9-Hz frame rate for use in restricted countries. The 150 Series Heat Spy imagers may be customized with an additional 0.5x wide-angle lens and one x2 telephoto lens, which are available separately to enhance the functionality of the camera for a specific application. The 3.6-inch, 640-by-480-LCD touchscreen display is clear and easy to see, providing comfortable access to menu functions. Housing design is ergonomic, and dual LED bulbs integrated above the lens act as headlights for clear, crisp visible light images, even in low light conditions. Laser aiming allows the user to pinpoint hotspots with precision.