For me, who wants to hear every now and then one of his old plates, the battery provides (9V) with on / off switch has the advantage that you can save the 10 millionth plug-in transformer. (Funny: The battery change is not explained in the manual For those who do not get out themselves: Do not remove any screws Simply the lid fully open!)
The massive metal housing (about cigarrettes pack size) probably holds also an elephant, but looks like a prototype. For me, no matter, is always just behind the turntables!
Functional and good price / performance ratio!