The AARC-EVAC™ ARX92-W-R, ARX93-W-R & ARX94-W-R Outdoor, Solar,
Standalone Wireless Linked Emergency Alert Siren & Message Broadcast
Units, incorporates an in-built Battery Backup UPS with a Solar Power Supply
and 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 a full standalone network of units to
provide for redundancy if the PA system fails for any reason.