Once you have seen an OLED display in use you will never want to use an LCD again!
Much brighter display, much better viewing angle and lower current consumption than backlit LCDs means that OLEDs are set to become the new LCDs!
The 'serial interface' PCB is fitted with a pre-programmed PICAXE-18M2 chip and may be used with a 8x2, 16x2 or