1.enviromental protection 2.low power,energy saving 3.esay installation 4.new design and surface 5.high air flow,low noise Main Feature:1. Full-automatic LCD speed controller, easy operation,steady performance.2. High voltage mute sound type nylon fan blade, big air output,low-energy consumption,low noise.3. Injection-moulded cabinet, pp homopolymer engineering material,add flexibilizer, UV-cut ...