subject: Why you need a medical alert system? [print this page] The main benefit concerned with medical alarm systems is that they allow the wearer a sense of security as they don't need a person that moves around them ensuring their safety. Many people questions about the power failure. The answer to this question is that they have rechargeable battery that will provide you with uninterrupted protection up to 90 hrs after power outage. These medical alarm systems also work with cordless phone. If you are feeling the need of installing this system then I am giving you a reference of a site named lifelinkusa.com that offers medical alarm system. Their medical alarm systems allow seniors to remain independent and safe at home. This company believes in providing best quality services at affordable prices.