HD audio with Harman speaker and wideband codec G.722 and Opus4.3-inch 480x272-pixel color displayTwo 2.4-inch

HD audio with Harman speakerand wideband codec G.722 / Opus3.5-inch 480x320-pixel color display2.4-inch 320x240-pixel

HD audio with Harman speaker and wideband codec G.722 and Opus3.5-inch 480x320-pixel color display2.4-inch

HD audio with Harman speaker and wideband codec G.722 and Opus2.8-inch 320x240-pixel color display2.4-inch

HD audio with wideband codecG.722 and Opus. High-definition2.8-inch 320x240-pixel color display6 SIP lines. 3 line keys

4 SIP lines, 3-way conference.SIP hotspot. 500 local phonebook.caller ID, call hold, call transfer 2.4” main color

128*48 dot-matrix display with backlight. HD audio with G.722 and Opus. Newly increased phone book / voice message key.