Purchase up to 3 more handsets with no extra wiring necessary. Base unit uses single phone jack and power outlet; each additional handset requires just a standard power outlet. Additional handset (model e560-2) sold separately. 5.8 ghz digital spread spectrum frequency hopping technology expandable system (use up to 4 handsets through a single phone jack) caller id / call waiting capability 50 name / number caller id history english / spanish / french setup menu lighted keypad 50 name / number directory display dial handset speakerphone clearspeak speakerphone in base intercom conferencing call transfer last 5 number redial any key answer mute headset compatible (2.5 mm jack) on-hook dialing wall mountable handset volume control adjustable ringer volume control page / handset locator 10 selectable ringer tones auto off 8 hours of talk time answering system features 15 minutes of digital recording time remote access memo variable speed playback call screening / intercept voice prompts