... one-way audio ,WIFI ,alarm in and out interface,support UPNP,PPPOE, Box IP Camera with alarm Features The ... optional . -Built-in microphone, support external audio signal and 2-way audio .-Support 802.11b/g protocol, can build ... of user authority.-Support 485 port ,can connect with 485 Pan/Tilt .-Support upgrading online.-Manufacturer Device ... , Safari and Opera etc. Box IP camera with alarm function