Need a simple outdoor motion-sensitive alarm system (battery / self-powered)

Hey guys. Thinking of getting an outdoor alarm system for my garden. Preferably silent type so that the intruder is not aware of its existence (because otherwise he/she might suspect I am growing something). One or two sensors is fine, which send a signal to a device telling me that something passed in front of them. There is no wall outlet in the area, so preferrably a battery powered system, or rechargeable or something like that. Many thanks in advance!!! Price is not an issue ...

I think I found a good one, need an opinion:

http://www.aartech.ca/rctd20u-optex-wireless-2000-driveway-entry-alert-kit.html

I live in ontario too. I wouldn't waste money on that. You are better of just being more stealth. If the cops find your grow and find the sensors. They'll nab you.

Trailingpickles said:

I live in ontario too. I wouldn't waste money on that. You are better of just being more stealth. If the cops find your grow and find the sensors. They'll nab you.

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No they won't. I can't explain on here why ... but I definitely need the sensors! I need to nab those trespassers, and have a warning system of anything approaching. And those ones (link above) are very small and will hide very well in the bushes! I will be very well prepared for any possible choppers and they'll have nothing on me. Except this correspondence, haha. Which is why I am not using my home computer for these posts!

The system will also be great to warn me against any deer. Plenty of deer in my area!

harbor freight driveway alerts http://www.harborfreight.com/wireless-driveway-alert-system-93068.html they are $11 each if you can find a coupon...