System Main Processor Embedded processor Operating System Embedded Linux operating system Button Type Mechanical Interoperability ONVIF Network Protocol SIP; RTSP; RTP; TCP; UDP Baisc Camera 1/2.7" 2MP CMOS high definition, low illumination Field of View Horizontal: 91°; vertical: 47°; diagonal: 111° Video Compression H.264 Video Resolution Main stream: 720p; sub stream: 1080p Video Bit Rate 256 Kbps–2048 Kbps Audio Compression G.711u Audio Output Built-in speaker, external active speaker Audio Mode Two-way voice call Audio Enhancement Echo suppression, digital noise reduction Audio Bit Rate 16 KHz, 16 Bit Casing Material Aluminum