This is the wearable communicator that lets you speak to a 911 emergency responder with a single touch. Providing peace of mind for those (and their loved ones) who live alone, or travel, hike, and shop by themselves, the credit card-sized pendant provides an instant link should you need emergency assistance. Unlike medical alert systems that rely on a call center middleman, with a push of a button this pendant’s speakerphone contacts the nearest 911 operator via the cellular network to summon help quickly. It allows users to maintain their independent, active lifestyle anywhere there is cell phone coverage—regardless of your service provider, or whether you have cellular service at all. And with no long-term contract, monthly service fees, or expensive batteries to replace, it's a most cost-effective solution. Includes neck strap and three AAA batteries. 3 1/2" H x 2" W x 1/4" D.