... two-way audio, waterproof, 40m night vision, four zone motion detection, Standard SONY 420, 1/3" CCD color sensor( 520 is optional ... , email alarm, upgrade online, centralized monitoring, multi-view, long-time record and replay etc.Sony 1/3 CCD, 420TVL ... DHCP,DDNS,UPNP,NTP Other Protocol802.11b/g(wireless IP camera) Other FeaturesMobile Phone Viewsupport Video controlsupport Dual way audiosupport ...