provides the same programming and control features of the SPROG II, in the same compact package, but with a major increase in available power output.
The power increase is really useful for those wanting to run their layout from DCC, in the most economical way.
With up to 2.5A, the SPROG3 will enable you to run as many as 10 locomotives simultaneously (typical operating load for N and modern HO locos is under 0.25A each, even for most sound locos!).
Note: Increased current is not generally required for CV programming, as this is specified by the NMRA not to exceed 250mA.
For full details about SPROG3 read the Sprog3 UserGuide and the SprogIIv3 UserGuide