This wireless personal assistance system is a great personal alarm system for the young and the elderly. In the event of an emergency, simply push the button on the wireless, waterproof neck pendant, and the signal activates the plug-in console to sound a built-in siren, dial up to 4 phone numbers, play a message that you have pre-recorded, and alert any number of optional X10 modules you would like. The person answering the call can listen in by pressing "0" on their touch tone phone to help determine the nature of the emergency. Easy plug-in installation. Easy activation with one-button wireless, water resistant pendant. Anyone who is alone and might possibly need emergency help will feel secure with the Personal Assistance System. Great gift for your elderly or very young loved ones! FEATURES: Calls 4 phone numbers with emergency message. Dialer announces pre-recorded message to called number regardless if called the number is busy Sounds a built-in siren The listener can push a phone button to listen in to the home through a console-mounted microphone No monthly monitoring service fee. Additional call pendants (HC-XPPPR01) are available separately for additional family members The system may be configured with any combination of the following items: Up to 16 Pendant Remotes Additional X-10 Pro automation modules such as plug-in lamp and appliance modules