
 | 4 Channel Automatic Telephone/Pager Voice Dialer United Security Products offers several versions of dialers. Choose the one most suited for your specific need. You can select between dialers that send a page, a pre-recorded voice message or both. The voice message can be recorded in any language and the page can be programmed to send a code that exactly identifies the type of event. The Listen-In and two-way Voice communication features on our AD2 and AD21 are ideal for many applications. Ask about USP's AD21 Data Logger model (AD21-DL) for memory retention of events. |
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