KX-T7020 speakerphone is similar to KX-T7030 above, but has no display. 16 programmable buttons, 12 with LEDs. Black or white       KX-T7030 standard LCD speakerphone is similar to the 7130 above, but narrower, and the display is smaller. It has 16 programmable buttons (12 with LEDs) instead of 24, and there is no off-hook call-announcing. Black or white     KX-T7130 deluxe LCD speakerphone has a large one-line LCD display screen. There are 24 programmable buttons (12 with LEDs) that can be set for line selection, intercom calls, speed dialing and features. Off-Hook call announcing. Automatic redial of busy number. Conferencing. Message waiting indication. Black or white.     KX-T7431LCD speakerphone has most of the same features as the 7436, but has 12 programmable buttons instead of 24, and the display panel shows one line of text instead of six, and there is no Off-Hook Call Announce though the speaker. Black or white         KX-T7433 LCD speakerphone is the same size as the 7436 above and has most of the same features, but the display panel shows three lines of text instead of six and there is no Off-Hook Call Announce though the speaker. 24 programmable buttons. Black or white       KX-T7436 deluxe LCD speakerphone, with adjustable pop-up LCD panel that displays six lines of text. 24 programmable buttons. Off-Hook Call Announce through its speaker, and Whisper Call Announce through its handset. Jog Dial. eXtra Device Port. 24 programmable buttons. Automatic redial of busy numbers.   Conferencing. Message waiting indication. Electronic volume control. 8 ringing sounds. On-hook headset operation. Black or white.