This is a genuine government issue IR strobe.
You can use the Phoenix Junior infrared beacon for the covert marking and positive identification of items of interest. This includes vehicles, personnel, mines, obstructions, landing zones, routes, passages, and air drop items. You cannot see the light from this beacon with your naked eye. You can view the beacon marker with any night vision device, such as the AN/PVS-7 or AN/PVS-14.
The beacon will immediately start flashing when you attach a standard 9-volt dry cell battery. Also, you can stop the flashing by removing the battery.