The ALINCO DT-930M is a 24V/13.8V compatible DC-DC converter. It comes with a manual and warranty, but was purchased as a spare around April 2024 and has been stored in a closet since then. (Please assume there is no manufacturer's warranty.) DT-930M ALINCO DCDC Converter 30A Class Switching Method Although it is a new, unused item, it has never been powered on, and the model number (930M, the previous model) is old, so it is being sold as junk. Bonus: Amon Wiring Tube 2m - Brand: ALINCO - Model: DT-930M - Warranty: Included - Voltage: 24V/13.8V - Accessories: Manual, Warranty Thank you for looking.