Long Range Driveway Alarm by Guardline (Receiver) Pack of 2

Easy To Install: Can easily be added to your existing Guardline home security system. There is no need to disrupt your existing system. Simply add the extra receiver.
Compatibility - This motion detector alarm unit runs at 915 MHz. If you are expanding your Guardline wireless alarm system, please make sure you are purchasing the same frequency as your existing set.
Expandable - The 1/4 mile extra receiver must be purchased to work with the 1/4 mile range driveway alarm. This receiver will NOT work with the Guardline 500 Ft Driveway Alarm.