It works but the Fall Button scares the hell out of me and I don't wear any more because it is super sensitive and I am returning it. It is not worth $10.00 a month laying somewhere. Why? because I am tired of the EMT's arriving on scene with sirens full blast Case 1. sitting at table Christmas day eating a meal and out of the sky the Mobile shouted at me, scared me, and finally realized what was going on and finally got thru it was a false alarm. Case 2. 4th Jan 2018 14 " of snow falling in literally a white out I came downstairs after taking a shower looked out the window to see that a whole squad of EMT's had plowed my driveway in order to get the ambulance up my drive. Assuring them I was OK they went away. Shortly after I called Tech support. They did a check on my equip and discovered that my Mobile Device was dead. I informed that the guide that came was not informative about charging it. I asked if it would be wise to place it in the charging unit when I am not using it. They agreed. This ought to update future guides. Tech support also wanted to do a system test and they did. Tech support asked if anything else and we hung up our phones. Perhaps a half to an hour when base station started to squawk I ran to find out the problem and was told the EMT's were on their way again. I informed Base Station I was Ok, was not near any equip to set anything off and they better cancel their call to EMT's. Last call for help was a few days late. Mobile device indoors with wrist strap on my arm while I cleared the wheel chair ramp. Just finished the job, turned around and saw my EMT friends backing up the drive. Remember I am not wearing the Fall Pendant anymore. I want to send it back.