The GE InstaJack is a two part system giving you the ability to place a telephone in any room without the need of a telephone wall jack and is super easy to set up. 1). Plug the main unit into an electrical outlet near a installed telephone jack.
2.) Using the included 6 foot telephone cable (if needed), plug one end into the jack and the other into the main unit.
3.) Plug your telephone in to the GE InstaJack main unit.
4.) Plug the second extension unit into any electrical outlet.
5.) Plug your second telephone into the second extension GE InstaJack unit.
Ta-da! You're done. GE InstaJack supports Caller ID and has built in telephone line protection (surge protection?). There are two chanels, A and B. So, if one is noisy or crackles, try the other.
Using the GE InstaJack spared me the cost of having someone come in to my home to install a new telephone jack in a room which did not have one. I have used the GE InstaJack system for about two years now and am completely satisfied with call clarity and reliability. A note to the wise though - if the power goes out, the telephone connected to the second unit is out as well. Even if the phone connected is not wireless.