From the blog

Interview with Mayor David Sander of Rancho Cordova CA

An In-depth Interview with the Mayor of Rancho Cordova David Sander
About helmets that were recently purchased for the Rancho Cordova High School football team. These helmets are equipped many sensors within the padding. It is designed for when there is impact from players. and as it
reaches a certain threshold, the sensors become very active and send a signal to a nearby device. It lets the school assist in monitoring every player on the field for any health issues such as concussions.