Support FAQ MORE Where to find the serial number of system? How long can 1TB hard drive record? Download link of files. What to do if phone or computer can’t connect What to do if you forget camera’s password? How to connect DVR on phone? CONTACT SUPPORT DIRECTLY firstname.lastname@example.org whatspp 0086 18613956025 Facebook messenger: Notice: The contact is ONLY to answer technical questions. For non-technical question such as price and order .