ATN ThOR-HD 640, 640x480, 19 mm, Thermal Rifle Scope w/ High Res Video, WiFi, GPS, Image Stabilization, Range Finder, Ballistic Calculator and IOS and Android Apps Excellent Image Performance with 640x480 Sensor - it is the ideal night vision scope because it detects heat energy, instead of light. The technology allows you to see clearly in complete darkness Ballistic Calculator - the system allows you to calculate the trajectory of your bullet, helping you to hit the target. It helps to improve your shot placement by adjusting your Point of Impact Build-in Smart Rangefinder - will make your life easier than ever. Discover how using a rangefinder can help you improve your target shooting skills and become an expert at the range Smooth Zoom - lets you magnify to target without losing whats in your FOV like with step zoom systems High Resolution HD Video Recording & Photos, Recoil Activated Video (RAV) and Wi-Fi Streaming - allow you to record all of your hunting trips, using your phone / tablet as a viewfinder. Firmware upgradeable