Never be caught off guard again. LiftMaster® perimeter alert systems detect motion and alert you when a pedestrian or vehicle approaches your home or property. Each system has up to a half-mile range and long battery life, and can be easily installed practically anywhere that demands notification or protection – driveways, garages, sheds, business fronts, or even back entrances. The systems can also be expanded to help protect your property even further.
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835LM
Perimeter Alert
New and improved alert system now with up to a 1/2-mile range! Alerts you with light and sound when people or vehicles approach your home or property.
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836LM
Extra Sensor - Perimeter Alert
New and improved alert sensor now with up to a 1/2-mile range! Detects motion of pedestrians and vehicles when they approach your home and property. Extra sensor to be used with the Perimeter Alert.
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