ATN OTS-HD 640 Thermal Smart HD Monoculars/Viewers w/ High Res Video, Geotagging, Rangefinder, WiFi, E-Compass, E-Zoom, 3D Gyroscope, IOS & Android Apps Thermal Sensor with 640*480 pixel HD resolution - the powerful thermal sensor gives the ability to catch heat signatures and let you see clearly in total darkness Smart Rangefinder - thermal monocular accurately measures precise distances to a subject using built-in rangefinder 3D Gyroscope and E-compass - gyroscopic image stabilization reduces natural hand shake and provides clear, sharp images. E-compass helps to navigate your way E-Zoom - this enables the device to focus on distant objects with clarity High Resolution Video Recording & Photos, Wi-Fi Streaming - allow you to record and stream video, share pictures from your hunting trip with friends. Firmware upgradeable