Medical Alert devices come in many shapes and designs. They may be in the form of buttons, necklaces, bracelets, pendants or wristwatches. They may have designer shapes. When a subscriber needs help, he or she will press the button on a medical alert pendant, bracelet, or on the base station. This will immediately alert a call center that a subscriber needs help and if the situation is serious enough to warrant emergency services, the call center representative will contact emergency responders and direct them to the subscriber's home.more