Back looking warning assembly and a method for determining the presence of a tangible entity in close proximity to the back of an individual

摘要

A portable assembly 10 which may be selectively worn on the body of a user 14 and which detects the presence of a tangible entity 80 which is located behind or at any other location or portions of the user 14. Multiple assemblies 10 may be utilized. The assembly may include a message generation portion 500 and a location portion 510.