No special one but good advertising ...the one hit adjustment is only a give knobe like a lot other machines with this design. On the pic is a maxon dcx Logo but its showing a re-max and in the specs you See its only a normal maxon . Dragonfly and stingray have more power and is very similar. For me its looks like a better clone with maxon Motor but 395 GBP + tax ???? Very expensiv for this