Laser Carved Keycap: Keycap printing adopts laser carving technology that makes it wearable, durable and long lifetime. Spill-resistant design: Spill-resistant design of the keyboard, so you don’t have to worry about the keyboard stop working with accidental spills. 1600 DPI tracking engine: You will enjoy responsive and smooth cursor control with the 1600 DPI high-definition optical tracking engine. Anti-oxidation sealed membrane: The sealed membrane ensures a longer keyboard lifetime. It prevents oxidizing of the inside circuit, which may cause defect keys.