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Because those cost $350 as opposed to $89, and the install only costs $60, and there is no stopping you from implanting more than one in different locations.

Many people get the small xEM or xM1 first to play with.

* https://dangerousthings.com/product/apex-flex/ * https://dangerousthings.com/product/xm1/



> there is no stopping you from implanting more than one in different locations.

Good point, although at some point you'll want to make sure your reader implements anticollision properly :)




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