I got it at a ham flea market, mainly for the nice enclosure. Of course I was very curious what was inside.
The circuit is mainly a RC oscillator with a 4024, of which the frequency can be set with the switch on the front.
Sold by Vitrotron
The interesting part is that the D+ and D- of the USB are connected. This is one of the chargers that reliably charges my wife's Nokia phone.
The high voltage transistors really exploded. If only the lamp is defect, the invertor is a nice source of components, 5 1N4007 diodes (1000 V, 1A), 2 high voltage transistors, a diac, a PTC and a few coils