A must if you install your own system,
October 22, 2011 S. Amabile (Northern NJ) - See all my reviews
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This review is from: Ethernet Port Interface (Electronics)
This allows you to put your ELK M1 on your home network for real easy programming. I've made multiple changes to my M1 as I learned some of the programming shorcuts. Everything you need to program is done through the ethernet adapter, don't have to touch a keypad except when you assign it a memmory base address.