The internal component of the clocking device = A battery, a timer and a tape which record at every check point station.
A tape will print a note on time of rounding and date. This is to ensure the duty of patrol is being carried out timely. The check point station can be installed at the perimeter of the hoarding and the print out will be the best check for timely patrol duty. it can be applied in construction site to minimise theft and material stolen cases.