http://www.aikencolon.com/flir-t420-thermal-imaging-infrared-camera - The Flir T420 Infrared Camera has 320 x 240 (76,800 pixel) Resolution and gives you maximum ?exibility and ef?ciency for hard working professional thermographers that have demanding workloads. FLIR T420 Features Continuous Autofocus - Thermography's 1st fully automatic focus keeps images extremely clear wherever you are aiming; accuracy and clarity couldn't be easier *(T640 only) Annotation - Add text comments or voice to your images or utilize the touchscreen for sketching drawings and notes; automatically include extra measurements using Bluetooth w/ Extech MeterLink moisture and clamp meters Sketch on IR and Visual - Quickly draw pointers and circles on your image to highlight a special area of interest with the touchscreen *(T440 & T640 only) Compass - Add the camera's pointing direction documentation to FLIR T640 bx and T440 bx images GPS - Add your location data automatically to FLIR T640 and T620 images to include in your report FLIR Tools Mobile - The newest mobile application for Android and Apple connects your device to FLIR T-Series infrared cameras for quick image sharing, processing, and transfer as well as live streaming video & remote control