This night vision device is an upgraded product with a smart chip and is not a digital night vision device. It can automatically sense and save electricity. Functionally intact and in normal use. Many components of this night vision instrument are made of metal structure, which is very durable and sturdy. The surface handle is made of genuine leather. The feel is heavy and heavy. Attention: After removing the lens cover during the day, the power cannot be turned on. Otherwise, there is a possibility of burning. Use two CR123A batteries (universal batteries, many online). This night vision device is a good helper for night observation, patrols, and forest tracking. American ATN tracker NIGHT SHADOW dual tube infrared night vision system. Lens coefficient: 90 mm; F1: 1.7. Field of view: 9 degrees. Diopter adjustment range:+/-5 degrees. Focus adjustment range: 2.4 meters – infinitely far. Working temperature: -40–+50 degrees Celsius. Storage temperature: -50–+70 degrees Celsius. Power supply: 2 CR123A sections. Battery working time: 60 hours. Weight: 1.2 kilograms.