Safety Technology International Inc.
4 Channel Voice Receiver
The 4-Channel Voice Receiver for the STI Alert Series sounds voice messages when alerted. When the voice receiver detects a tripped site, it sounds programmable voice messages to alert which transmitter activated. The receiver offers ten tones/tunes and 53 selectable words in English or Spanish. The selectable words can be programmed simultaneously in sets of up to four to create a custom message, "emergency exit side door, emergency side door exit," etc. Receiver monitors up to four different STI transmitting devices at a single, convenient location. It has 1000’ line of sight range and is supervised for low battery and connection.
http://www.sti-usa.com/product.asp?PartNo=STI-V34104