How many times is this same subject going to be rehashed and posted? This video is probably in two or three other threads.

PHOENIX JUNIOR is an extremely rugged and low-cost marker beacon. It is used in conjunction with Night Vision goggles (NVG) and other Night Vision devices (NVD), at night, as a covert position marker. Phoenix Jr. was originally designed as a combat identification marker to minimize fratricide (the inadvertent killing of friendly forces, by friendly forces).

The Phoenix Jr. has been widely fielded by American and coalition forces for combat identification. The beacon has many uses in combat and other covert operations for marking personnel, vehicles, safe pathways, or locations. It incorporates a flash rate that was specified to prevent confusion with small arms-fire. Use the Phoenix Jr. to identify friendly force positions, demarcation lines or perimeters.

Fixed flash rate

Common 9V battery operation

Optional trip wire device

Optional Vehicle Power Supply


PHOENIX JUNIOR is the world standard for covert signaling and identification of Military, Law Enforcement, SWAT and Homeland Security Agencies.

SPECIFICATIONS
Weight: 1 ounce
Size: 1.5" x .625" H
Battery: Common 9 volt
Configuration: 3 Light Emitting Diodes (LED)
Coverage: 180 degrees x 180 degrees
Switching: Attach or remove battery
Operating depth: the battery contact is exposed however if immersed the unit will continue to operate until the battery contacts fail due to water and electrolytic corrosion. Given these conditions the depth limitation is solely determined by the battery’s ability to withstand depth. www.gunbroker.com

It looks harmless to me, could come in handy if you are lost at sea

A few of those, some cat's eyes and some IR marking tape might be a good thing to have, especially if you think you might be making your way through the countryside at night on foot in an "escape to the country" scenario.