I was given this item , and I would like to know what it is for .
It seems to be a charger of some kind . 12 volt automotive plug input , output is a 6 pin female round
receptacle , that looks like an aviation connector .

Front panel has a green LED , Power with a rocker switch , On/Off.

Also has a red LED with a small switch , marked Chg. On/Off.

Unit is identified ... NISSEI CA-0003 .

I tried Google ... no luck !

Anyone know what it is ?

 

take a better picture

 

Looks like an Ultra life battery charger. CA0003: Vehicle Adapter.

 

12V power supply for Nissei Fax 305 portable fax machine.

Here is the AC mains power supply: