For trainee military types, it’s often difficult to know who one is supposed to salute. If you make the wrong choice, you get in trouble (and with low-visibility rank markers now commonplace, as well as joint operations between different services of different countries, the task is becoming harder).
Today’s invention is a bluetooth button which clips to one’s epaulette (or brassard or gorget, or whatever).
When you approach a similarly equipped soldier or sailor or airman who is of higher rank, your button buzzes your right shoulder -prompting you to salute his/her uniform (and helping you avoid peeling another 1000 potatoes).
