PowerDuo keeps your device charged in auto, boat, RV, home, hotel, or dorm room.
The universally useful PowerDuo package includes the PowerJolt auto charger and the PowerBlock wall charger.
Power and charge your device from your wall outlet or vehicle power port. PowerDuo includes our PowerBlock AC wall charger and PowerJolt 12 volt vehicle charger. Both are compatible with any Sansa player with a charging connector and rechargeable battery. PowerDuo’s versatile voltage compatibilities make these chargers ideal traveling companions.
This seems to be the same charger on Amazon without the extra cable for $16.