Do they have to be installed into a security system or are they stand alone devices?
1881030
They have to be wired into a loop of an existing security system, that expects a normally closed (NC) circuit. Upon detecting glass break, they will merely open the circuit, they don't do anything else.
1881031
Must be installed. However, if you put them up and make it look like they are installed, they would probably be a very effective deterrent (considering neither of your neighbors probably have them and so it would make your house seem more likely to go wrong when burglarized) ...
2058757
Yes, to a degree. I have these (3) installed on iron fences and most "visitors" are unsure if how they operate so they can't get in. That said, they are not security measures at all, but easy to unlatch and automatically latching devices. Keeping the unwanted out is best done with a physical locking device. This is only a deterent.
1959973
If you have some way of connecting them. It is an individual unit. I would not recommend it.
869544
You will need 2 of them, and a direct line of sight. They are very easy to install however. Just go on YouTube an they have tutorials
1732682
I had wired cameras installed before . I've had these for a year now if only replaced the batteries on one camera once. Great economical security cameras
2214172
No, these actuators are just the mechanical "motor" for your door locks. They have nothing to do with your security system or keyless entry remote.
649943
This is a door or window sensor. It is not stand alone it was added to my existing system.
1414648
These cameras are just an add on to a dvr system. They can not be used stand alone. I had this hooked up to my lorex dvr system. But to be honest this camera is junk.
365529
The Cameras also have to be plugged into a wall (unless you have battery or solar powered cameras) Maybe a surge protector for your camera's and your dvr.
1957838
The siren is not a stand alone alarm system. It is a signaling device. It must be connected to an alarm system.
2052877
It works perfectly as a stand alone system. I found this review helpful: http://www.youtube.com/watch?v=2bj_-bYA53E
2159279
No, it's a all in one device. Just needs to be mounted on the roof. No wiring required.
1752361
No they don't. You either have to put one or I just installed a switch to turn it on when I need it.
2062394
Yes, but it is more secure with them for the user, speaking from the user perspective. Keep looking on Amazon, maybe there is a different product without them
518676
These units are not wireless. They provide a contact closure output and require a physical connection to any alarms or other devices.
939150
They are wireless in the sense that you don't need an ethernet wire connected to a base unit (like a DVR). However, the cameras still require electricity and must be plugged into an electrical outlet.
860172
They require 120VAC power, i.e., need to be plugged in. They are portable, but need a power source.