Built-in four fans provide massive airflow to cool the whole notebook base with no blind area The creative Multi-Core Control Technology enables users to apply 4 different fan-working statuses: 4 fans on / 2 upper fans on / 2 downside fans on / 4 fans off Ergonomic design with 2 viewing angles available for the most comfort in use Massive metal mesh panel for superb cooling performance 2 USB ports allow users to connect their personal USB devices