TL866 II PLUS
The TL866 II PLUS is NOT compatible with the TL866 A / TL866 CS models. The microcontroller has been changed to a PIC24FJ256 on the TL866 II PLUS.
The plastic enclosure for the TL866 II PLUS is identical to the TL866 A.
Photos
TL866 II PLUS photos
Photos of a TL866 II PLUS bought April 2018 from eBay seller goldenchipset.
Red and yellow LEDs were desoldered from mainboard to allow separation of the two PCBs.