Works straight out of the box, flawless, securely packaged and delivered quickly. To get the most out of its potential, the closer the better (for the base and remote units), the further away it causes crackling and noise on the line. The best option is "line of sight" and less than 50 feet for me, walls with metal inside will reduce the RF signal a bit. Very happy with this one, answering machine works at home where there is no wall phone jack and it works great for me!
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