PVS-31C-MOD is a versatile and easy-to-operate night vision dual-tube binocular-goggle unit with superior depth perception. It is mostly used for conducting all kinds tactical operations in both rural and urban environments. PVS-31C-MOD combines ergonomic design with improved functionality and accommodates features such as a dedicated Instant-On-IR button: this enables to quickly and momentarily engage IR illuminator without having to operate the switch to communicate between crew members using Morse code. The connector located at the front of PVS-31C-MOD is used to supply power to the unit from almost any power source: external battery pack, USB power bank, 12V car socket and so on. The device is also be powered by AA or CR123 battery that can be installed regardless of polarity—it is just one less thing to worry about in the dark environment.