The new RCA Executive Series 25404 is a stylish, high-quality phone, with a wide range of convenience features for small business or home use. You can use up to 16 phones together in a system. No central control unit is required. You can use loop-through or home-run wire, with two 2-line ("RJ14") jacks at each phone location. Each phone needs an electric outlet. The phones are not designed for wall-mounting, but you can use a shelf or a couple of "L" brackets. This phone is perfect for professionals in private practice, and small business operators who need versatility and value. Convenience features include hands-free dialing that allows you to continue working while making calls without picking up the handset. Once you pick up the handset, the phone automatically switches the call to the handset. You can also use a headset for hands-free convenience with minimal ambient noise. Time-conscious executives will also appreciate the exceptional time-tracking features, displayed on a large and easy to read backlit LCD display which constantly indicates the number dialed, time of day, date, memory verification, call timer and memo. You also get a four-line switchable data port for fax, modem, credit card terminal, answering machine or conference speakerphone. The RCA Executive Series also features adjustable, independent volume control for speaker, handset and ringers, Do-not-disturb, three-way conferencing, distinctive ring, Caller ID on Call Waiting. It\'s compatible with GE 29487GE2 and 29488GE2 models.