The AARC-EVAC™ ARX92-R, ARX93-R & ARX94-R Standalone Wireless
Linked Emergency Alert Siren & Message Broadcast Units, incorporates
a Solar Power Supply, Battery Backup UPS and a Repeater Transmitter.
They are fully self-contained making them ideal for use in locations
where there is no existing PA system, or to cover areas not serviced by
a PA system or as part of a full standalone network of units to provide for redundancy if the PA system fails for any
reason.