Victron Orion Tr-Smart 12v 30 amp Dc to Dc isolated charger.
This charger is new, never installed. Purchased 3 years ago but I did not install it. It is designed to charger a second battery from your RV or boat starting battery when the engine is running. Bluetooth capable so it can be programmed with your phone.
I don’t have the box or paperwork, but the manuals can be downloaded on victron’s website.