A320i: -Android 9.0 OS -20 SIP Lines -Gooseneck Microphone -Built-in Camera -10.1-inch Touch Screen with 112 DSS Keys -Support Three-way Video Conference -Support H.264 Video Codec -Built-in Harman Speaker -Fanvil PTM Phone Handle(Optional) -Built-in 2.4G/5G WiFi and Bluetooth -Support EHS Wireless Earphone -Grey color A212: Wall-mounted Speaker Size: 184.85mm×275.38mm×124.56mm 2SIPlines Mainspeaker15W/8O can be connected to external 15W/8Opassivesub-speaker Built-inmicrophone,supportmonitoring,self-test, intercomapplication Support 20 multicast partitions Built in 24M Baudiofilestoragespace,support scheduled task broadcast Customize audio files for emergency notificationand alarm 3short circuit input detection, 1short-circuit output ,linkage security alarm device Support external IP camera video linkage Support Web remote adjustment volume Black