I should have known, a couple weeks after purchasing a new 300E there's an even newer model, the 300E Plus. I see that it has an audio output and an LED indicator, nice to see a company that listens to user suggestions. Are there any other enhancements that we should know about?
The LCD changed to a high contrast Black/White type. Improved the tube voltage driver circuit to be more efficient. The software added reset total count and erase history data menu items.