17characters. The introductions of keys onthe input boxes are shown below.Button MeaningBackspace keyDelete KeySwitch key between upper and lowerletterSwitch key of languageSwitch key of punctuation characterEnter keySpace key2.5 Common ButtonOperationButton MeaningClick it to show themenu list.Click it to change thesequence of the list.Click it to change thecamera displayingmode.Click it to close thecurrent interface.Click it to go to theearliest date of camerarecording.Click it to go to thelatest date of camerarecording.2 Basic Operation Guide