... Features system security supports there-level such as account, password and user multi-level authority management DDNS (free) built-in free DDNS ... 1, 4, 9, 16, 25, 36 and 64-channel No user limited Centralized monitor, remote record and playback, Skype message alarm, Skype telephone ... Second stream: 1 to 25fps Video adjustment brightness, contrast and saturation Minimum illumination: 0.5 lux/F1.2 S/N ...