A:Answer 1. No, it is not dual voltage, but you can always purchase an adapter for that purpose.
2. Yes, it can be connected to more than one monitor. HDMI splitter is required.
3. It doesn't need Internet to work, however if your purpose is for remote view, then Internet is required.
4. No, It doesn't require a professional for the installation. It comes with all the necessary for self installation.
Best regards,
Jefferson Martinez
Network Engineer
(832) 881-6183
jefferson@jmznetwork.com
www.jmznetwork.com