A Medic alert system is a device that helps a person who is unable to take care of themselves get the help they need when they are unable to do so. There are a variety of Med alert systems available, from wearable devices to home-based systems. The most common types of medical alert systems are those that are worn on the body, such as an anklet or bracelet. Other types of medical alert systems include home-based systems, which are usually installed in the home, and wearable devices, which are worn on the body. The most common types of wearable devices are wristbands or necklaces.