Quote: "The Ducky Shine 4 arrived Technic3D. "Ducky uses only genuine Cherry MX switches. Shine 4 is available in different switches to suit different preferences. Dual layer PCB is more durable and reliable than single sided PCB. This will give longer life expectancy as well as signal stability of the keyboard functions. Combined with a steel backplate, dual layer PCBs will give the user extra solid feel with each keystroke?" Technic3D will see the complete functions and the Dual color LEDs in the following Review."
Link: http://www.technic3d.com/review/eingabegeraete/1762-ducky-shine-4/1.htm