Video Door phone,door bell,intercom

Video Outdoor phone MODEM design,PC software management,surpass ancient management center,with customer data maintenancecallingunlocking functions. Optional functions: multichannel video indoor unittalking recordupgrade remotely,community news scrolling broadcasting(for example: one joke everyday,weather forecast,voting information,water/electricity stopping warning,bacterin/children trusteeship/important owner meeting,safety caution,community activities,realty charges...etc.)  Configuration: one Modem,one management software,one 4-ch DVR card,one 9V/500mA adapter,one RS232 cable,one microphone,users is unlimited.(sound box and PC is optional)

Video door phone MODEM design,PC software management,surpass ancient management center,with customer data maintenance,calling...