It started with the battery. As soon as it was put in place, the unit indicated tht the battery was low or dead. so I got a brand new battery. Same result. Then tried to utilize the product, carefully following directions--programmed it to my cell phone, and ran the test procedure. The phone never rang.conclusion: defective unit.Action: Called Reliance, talked with a helpful lady, who tried to refer me to the service expert--I was never called back'