The PRO15S is the replacement for the MXS 15, the internals of the PRO15S are an all new design that allows for running at peak power output without any derating for heat dissipation. It also includes a Lithium charge profile.
Otherwise it still has all the same features in the same sized housing as before but in the updated black colour.
Normal features included:
IP44 rated
2 year warranty
Alligator clips (no comfort plug connectors because of its high power output)
Normal Charge
Power Supply Mode
Recondition Charge Mode
15A output at 14.4 volts
DC output voltage temperature compensation