LiftMaster 835LM Wireless Perimeter Alert System Set

The Liftmaster Perimeter Alert system detects motion up to 30 feet away with wide 120 degree coverage. The 835LM transmits signal to base up to 1/2 mile away.The Perimeter Motion Sensor features adjustable sensitivity control to prevent false alerts from small animals. Alerts you with light and sound when people or vehicles approach your home and property.

1 Base Station
1 Motion Sensor
1 Ac Adapter
Sun/Rain Shield
Mounting Hardware
Non-Slip Feet

Detects motion up to 30 feet away with wide 120 degree coverage
Transmits signal to base up to 1/2 mile away
Motion Sensor features adjustable sensitivity control to prevent false alerts from small animals
Detection indicators with light and sound
Receiver features adjustable volume controls
Connect 1 base station with up to 4 motion sensors
Portable and lightweight for use inside or out
Durable, weatherproof design
Easy to install and use
Receiver requires one 9-volt battery
Sensor requires four AA batteries
1-year warranty

Warranty: 1 Year Manufacturer Warranty

7 Quick Tips for Buying Garage Door Opener Parts

You will need to know several details about your garage door opener to select the correct parts for it. Manufacturer name and model number are usually necessary.
To find detailed infomation about your garage door opener, look on the garage door opener power head located on the ceiling of your garage. Usually stickers and identifying information are found on the back or sides of the machine.
Garage door opener manufacturers change the frequency at which remote controls and keypads function periodically, so you will generally need to know the model number of your garage door opener.
Some models of garage door operators use radio gear (remote controls, keypads) from another manufacturer. In this case, you will need to know additional details found on a currently working remote control.
Use our Garage Door Opener Selection Guide for details specific to your brand of garage door opener.
On each product page there is a section called "Compatible with". This section gives details on manufacturers and models numbers that use the particular garage door opener part, remote control, keypad, gear, or other part.
If you are still not sure which part will work with your garage door opener, Contact Us using the web form on the contact us page. Please include details about your garage door opener manufacturer and model number in your question.

Customer Reviews

Average Rating

	Excellent Product!
	My wife and I purchased the Perimeter alert last summer and set it up in our driveway. It works great, I know when someone has arrived in our yard by the sound, no need to wait for the doorbell to ring!!
	Reviewed by: Conway from USA. on 3/24/2011