Matrix Interactive LLC is the manufacturer and provider of state of the art medical alert systems. Matrix has been in business since 1990 as a technology business, and we have offered our no-monthly-fee systems since 2003.If you or a loved one has fallen and can't get up to reach the telephone to call for medical assistance, our no fee elderly medical alert system calls for help to your cell phone, your regular phone, your pager, even 911, with the exception of California. LifeLink® sets the standard for the no fee system. It can be installed in less than 15 minutes, and couldn't be easier to use. No additional electrical or telephone wiring is needed to get the medical alert button installed and ready to go. All you need is a phone line and an electrical outlet. Fifteen minutes later, you're all set up.