Focus on the bird you're interested in, press the release button, and the AX Visio will identify it for you, using the Merlin Bird ID app; The compass displays in the right eyepiece, showing compass readings so you know exactly where you are; The 13MP (4208 x 3120) camera captures images and video you can download to your phone or device for saving and sharing; Individual diopters and seven-position twist-up eyecups customize the view for a wide range of vision, for eyeglass wearers and non-wearers alike; SWAROVISION field-flattener lenses provide a bright, crisp, undistorted image from edge to edge with 88% light transmission and a 336' field of view at 1000 yards