C-Vent, ventilating leads to high heat radiating, no need fan or air-conditioner, reducing 50% energy consumption. Advantages: 1. Ventilating: Air can transmit the display body directly, ventilation rate 50%. 2. No light penetration: Penetrating design without light penetration, no harm to contrast ratio, full conservated the display effect. 3. Front access: Front-maintenance module is convenient for disassembly and assembly. 4. Low windage resistance: Lower requirement of steel structure, 35% structure cost saved. 5. Air-conditioner exonerated: Ventilating leads to high radiating, no need fan or air-conditioner. 6. Energy-saving & environmental protection: Low power consumption, 50% energy saving. 7. High applicability: IP65 fully sealing design, rain proof, dust proof, adapted to all weather surroundings.