If you are considering a wireless alarm contact - this is the only way to go! They are completely hidden when the window is closed and work well in doors. You will need the correct drill bit, which you can get from Home Depot. If you buy one that burns through batteries in a couple of weeks, it's probably defective. This occurs in a very small number of them. They should last a very long time on one battery.Get more detail about 5800micra Single Door/window Transmitter.
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