I found this on the street some years ago. I dug it from under my desk today and took some pictures. Not sure what to do with it. I assumed it was broken since it was on the street.Not sure how to test this. Looks like it has two rechargeable batteries inside, with a jack for a charger on top, 9v 12v? Looks like it has a TL072 as a preamp and a TDA2002 as the amp. Google seems to think this is a 6 to 10W amp.