Pro+ is not Pro 2
The similar names hide a real hardware distinction. The SN30 Pro+ uses startup button combinations to select its mode. Our earlier description of a four-position rear slider and Pro 2-style rear controls was incorrect.
When buying used, ask for a photo of the model label and rear shell. A seller may use Pro, Pro+ and Pro 2 loosely. Check the actual unit before paying for a feature you need.