This is a night vision scope that uses thermal imaging instead of visible light. It has two power settings--4X for close range, scanning, or moving targets, and instant 8X for longer shots and greater precision. It has the option of either a white background and black target image, or a black background and a white target image. It features over 10 hr. life on a single charge of the battery, so you can hunt all night with no worries of losing power. It mounts with normal 30 MM rings. I have personally tested a similar model, and could easily make out and identify coyotes, calves, dogs, etc., at over a quarter mile, and I followed an owl in flight at 100 to 200 yds. and saw it catch a mouse, all on a moonless night! Customers have reported several clean kills on coyotes at over 400 yds. with a 3-6X model! Kansas residents must add sales tax.