A poster on Sony Insider forum
discovered two service manuals for models named PRS-300 and PRS-600.
Both manuals mention "US, Canadian, UK, French, German, Netherlands Model"
PRS-300: 5" screen, no touch screen, no audio output, no card slots, ~440MB user partition, 220g.
PRS-600: 6" screen, touch screen, audio output, SD/MS slots, ~380MB user partition, 286g.
Manuals mention silver, red and black colors for both models.
No built-in lighting or wireless connection seems to be present in either one.