Uniden Uip165p packet 8 compatible 5.8ghz digital voip telephone UIP165P Packet 8 Compatible 5.8GHz Digital VoIP Telephone DirectLink™ feature allows handsets to be used for two-way radio communication away from the telephone base. You only need one phone jack to operate each handset. The 5.8 GHz technology lets you talk anywhere in your house and still have clear reception. Speakerphone is featured on both the base and handset so that you can always talk hands-free. This telephone system is expandable to support up to ten handsets. Four-way call conferencing allows three parties to be linked together for important conversations.