Its most likely a Ritron Alerting Transmitter.. They were popular in the 90's for remote monitoring of contact points ( water alarms, entry alarm or any other alarm contact).. when an alarm point closes the transmitter keys up and transmits a pre recorded message than un keys.. If the contact is still active, it starts over.. They were synthesized so Frequency was programmable...
PRO668 (3), HP 1, PSR800 (2) , PSR600, PSR500, PRO2096 (2), PRO106, BCD 296D P25 card, Commercial FCC license, Ham General, FAA Private Pilot, Business Owner, APCO Certified Tech.