https://www.atncorp.com/smart-hd-weapon-sight

Need a lightweight way to scan a field without raising a rifle? ATN thermal monoculars fit in a jacket pocket and detect heat signatures in complete darkness. They suit scouting trips, search tasks, camping and wildlife watching. Simple controls, a bright display and a rechargeable battery keep things easy, while video recording lets you save what you see. ATN Corp, founded in 1995, also produces night vision monoculars and clip-on thermal imagers that attach to existing day optics.