Valcom V-CDT
The Chronograph Timer Control Box allows the V-D11040A to be used as a timer for sporting events, operating rooms, etc. The chronograph functions of the digital clock includes count up or count down modes in Hour:Minute (HH:MM) or Minute:Second (MM:SS) modes.
Counter can be interrupted and resumed. The V-CDT allows the clock to resume time of day display when the chronograph function is not in use.