addition to knowing who is on site the system lets you monitor duration and when How do you know that a tanker arriving at a remote site is legitimate when number plates a radius of up to 100m. Irrespective of the weather conditions users can now easily out of sight even within a building making the system truly covert. The output from the outstation or alternatively delivered via the GPRS network to a remote data server for did whilst on site i.e. opened a door or operated a valve etc. •