NO MONTHLY CHARGES SENIOR LIFE GUARDIAN MEDICAL EMERGENCY ALERT PHONE SYSTEM PAVDII No Monthly Fees - No Contract - 100-150 Foot Panic Button range - Telephone Speakerphone Waterproof Panic Button - Calls 1-30 Phone Numbers using a landline In the Event Of Emergency (up to 4 more panic buttons can be added) Strobe Light Ringer - Amplified Speakerphone and Ringer (great to see the phone ring when the environment is noisy) * Uses normal home phone line * If you don't have a phone line it can use an optional cellular bluetooth adapter to dial out through your cell phone Battery backup - Talking caller ID - Big Buttons -Talking Buttons when dialing