This is an optional accessory for  thermal monocular

The infrared thermal imaging night vision device has an external display handheld screen, supports analog signals, supports multi-angle rotation and folding, and provides HDMI interface. Movable cross electronic ruler; Support reverse charging, two replaceable 18650 high-capacity lithium batteries; Charging and video at the same time; Support power display;

It is a external screen for thermal imaging handheld device that provide HDMI interface.