The USP Automatic Voice Dialer, 2 Messages (AD-2001F) features busy-line and no-answer detection to ensure prompt transmission of up to 2 prerecorded messages delivered sequentially to as many as 4 standard telephones, cellular phones, voice and/or numeric pagers. Messages to both local and long-distance calls can be transmitted. When activated, the dialer instantly begins calling the numbers in sequence, delivering each message 1 to 3 times in a row, in accordance with the preselected number of dialing attempts. The AD-2001F is extensively programmable, offering personalized customization to fulfill virtually any residential or business requirement. Plain-English prompts walk the user through the process in a timely manner. Installation and hookup are quick and easy, whether installed in conjunction with normally open, normally closed dry contact or voltage activation sensors. The unit can also function as a stand-alone device, by simple connection to an ordinary telephone jack. FEATURES: 2 separate voice message alarm zones. Calls up to 4 telephones, cell phones or pagers. Built-in line seizure. Remote Turn Off feature allows termination of activated channel. EEPROM Memory retains programming despite power loss. Listen-In verification and 2 way communication. Universal Dial Tone. Works with any analog phone system. Built-In Auxiliary Output to drive external siren, strobe or relay. Applications: Security/burglar/fire alarm notification. Equipment malfunction notification. Environmental warning notification. High/Low Temperature threshold notification. NOTE: Power Supply Sold Separately.