Glossy Magnetic Badge

It consists of a metal plate (likely for the name badge itself) and a separate magnetic backing piece. 

The magnetic backing contains strong neodymium magnets designed to hold the badge securely through clothing without causing damage. 

The warning "CAUTION - MAGNETIC DEVICE DO NOT USE WITH PACEMAKER" indicates that individuals with pacemakers should avoid using this product due to potential interference. 

These types of magnetic name badges are commonly used in various professional settings like retail, healthcare, and corporate events as an alternative to pin fasteners.