This is a Professional Mariner 2-70-3 model meaning 2 alternater, 70 amp, 3 battery application. Cost over $150.00 new. Will take $75 for it in box with instruction sheet.

Had a charging problem when I rigged my pre-owned 382 and thought it was the isolator. New one didn't fix the problem so I ended up with a spare.

Let me know if you are still interested.