For a great deal more information on night vision in general, and also a place to find decent prices, go to Nightvision For Less (it's a website - google it). The people who work there are friendly and well informed, at least in my experience, and among a consensus of five star reviews. PVS-7 Gen 3 Autogated/pinnacle night vision goggles: Res 64/72. Used about five times during nice weather, perhaps five hours total activity, Im still using the same pair of double As that came with the unit. Very carefully handled, no bright light sources. IR works perfectly; Autogation works ...