Blue Cave's unique styling and powerful performance are both made possible by our sophisticated WiFi engineering. Internal antennas are often a compromise: they allow a neater external design, but they can be prone to performance-sapping interference. On Blue Cave the four fully-optimized antennas actually outperform some external antennas by up to 28%. The location and orientation of the antennas relative to each other and to the internal circuitry was carefully decided by experiment to give the best possible WiFi signal in all directions: the widest coverage was attained with three vertical antennas and one horizontal antenna that helps transmit the WiFi signal across floors. The ultra-slim circuit board and custom graphene-coated heatsinks were specially designed to make best use of the internal space.