-Android 9.0 operating system -6 SIP Lines -Built-in Bluetooth 5.0 and 2.4G/5G Wi-Fi -HD voice with built-in 1W dual speaker and AEC -Integrated Micro USB and TF interface -Support ONVIF -Possess 8 alarm inputs and 1 RS485 interfaces -PoE, External Power Supply(Optional) -G.711A/U, G.729AB, iLBC -G.722, Opus -Hardware video decoding: H.264 -Video call resolution: QVGA / CIF / VGA / 4CIF / 720P / 1080P -DTMF: In-band, Out of Band DTMF (RFC2833) / SIP INFO