AN/PLQ-57 Infantry Decoy

The is a piece of UNSC equipment

Description
Produces holograms and false RADAR and SONAR signals of either enemies or friendlies. In the right hands this simple device became one of the most lethal weapons of the war, with the potential to lure any enemy, even entire squads, into a false state of security. On the battlefield the 'Ghost', as it became known, delivered more than just death, but fear and uncertainty to all enemy spotting troops.