This listing is for a VERY rare Zig DCU-15 power supply unit for caravans and motorhomes. It has been tested and is in good working order. It has a mains input (when connected to EHU) and has a 12v DC output to power your 12v appliances lights, fans fridge etc. And also to charge your leisure battery. I don't know a huge amount about this apart from it is very rare and in good all round condition.I was going to keep it in my old motor home, but have decided to modernise the electrics, so have bought a newer unit. For anyone wishing to stick with vintage parts, then this is ideal. Alternatively, collection in person from Milton Keynes is also an option.