Image sensor: 1/3-inch Sony super HAD CCD CMOS sensor and VGA resolution Infrared light: infrared LEDs and effective range up to 10 to 20m Audio output: one-channel linear output Supported protocols: TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS, ARP, ICMP, POP3, NTP, IPsec, UPNP, RTP, and RTCP Alarm input: one-channel on/off input, supports NO (normally open) or NC (normally close) User can view image through IE or DDNS to realize the real-time surveillance and play-back Supports remote surveillance by mobile, it is compatible with many kinds of intelligent mobile operation Supports internet listening, internet broadcasting, two-way audio function, built-in microphone and speakers Supports local and internet storage, built-in microSD port, integrated with many internet storage protocols and supports network hard disk function Integrated wireless alarm gateway function, supports many kinds of remote control and wireless detectors For example, infrared, PIR, curtain sensor, smoke detector, gas detector, supports many kinds of wireless sound and light controller Supports local, central, network, and mobile message to set alarm on/off Supports local and internet alarm Once there is a trigger alarm through sensors, the video recording will be active and start to record the spot picture and video automatically They are stored in the preset storage equipment as TXT, JPG, and MP6 formats