TIMENET Pro is an accurate, low cost, extremely compact universal atomic clock reference for network time synchronization. CCTV and digital video recorder (DVR) installations require accurate reference time signals for synchronization of system clocks to ensure that they are always set at the precisely correct time. It is crucial that all recordings are accurately time-stamped, especially for evidential purposes. Many DVR products, especially those which are PC-based, have inaccurate internal clocks which drift by many seconds per week. Considering that DVR systems may be left unattended for months on end, it is easy to see that the time settings can end up being in error by many minutes.