The market for Personal Emergency Alert Systems and Medical Alert Devices is growing rapidly.   See the below report show the market analysis for Personal Medical Alarm Systems.

http://www.medgadget.com/2015/10/personal-emergency-response-system-pers-market-value-share-analysis-and-segments-2015-2025-by-fmi-estimate.html

Find more information on the different types of medical alert systems such as Landline PERS, mobile GPS pers, and stand alone voice communicators.

PERS Medical Alert Necklace