This merchant - Russell Sensler - is the vendor of a 'Personal Emergency Response System' which is marketed at the following website: http://www.chaperonealert.com/ A PERS (Personal Emergency Response System) is a device that's worn as either a bracelet or necklace. If you need help, you simply press a button on the PERS device and a central emergency station is instantly signaled by phone. The emergency station promptly communicates with you via a special wide area speaker-phone that is usually included with the PERS... read full review »