The Wireless Chime alerts you when someone enters the detection zone. 500 foot operating range between receiver and transmitter. Detection zone is 140° x 40 feet.
The STI-3610 is compatible with STI-3300, STI-3360, STI-3350, STI-3601, STI-3353, STI-3301, and STI-3551.
Note: End user must verify the alarm and battery (CR123A) every six months and replace battery annually or as required.