Digital Night Vision Electronic View Finder F1.4 Large Aperture IR LED Visible Distance: 200M (220 yards) at Night, 500M (550 yards) at Day Zoom in and out Capable (up to 2X) Auto Day and Night Dual Mode Switch New Button to Adjust the Screen Brightness for Eye Comfort New Full Range View New Improved Battery Compartment for Easier Battery Installation New Battery Life: Up to 10 hours for Day Use, 6 hours for Night Use Perfect for Hunting, Sports Watching, Security, etc. Patented in CN, EU and U.S.