Hi wood Dog
The one I have and use is the 1st one below because it's the best one for the money
http://www.grizzly.com/products/h2797
Others below
http://www.grizzly.com/products/g5956 http://www.grizzly.com/products/g4699 http://www.grizzly.com/products/g4700
The other one I have is one I made with a remote alarm for a car, it also works great.... made it for aout 10.oo with some used parts I had around.
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