The ChargeMaster™ Dispenser can be added to the ChargeMaster 1500 Scale to form an unmatched combination of speed and accuracy. When the ChargeMaster Dispenser is coupled with the ChargeMaster 1500 Scale, it now has all of the same features as the ChargeMaster Combo. The individual purchasing of the units is to accommodate individual budgets. The ChargeMaster Dispenser requires the ChargeMaster 1500 Scale (sold separately) to operate.