Series of semi-metal ultra-quiet 
 Spiral structure, lower noise levels of tap-type motor is placed frictions smaller, lasting up to eight mute 
 Wind wheel design, the same amount of wind speed greater 
 Wind round: wind wheel design - the same speed, air volume greater 
 Spiral structure - into the air by the wind turbines at both ends, a significant reduction of noise 
 Body shell: using quality materials, effectively reduce the vibration noise, light and durable 
 Mask: modern standards slim design, attractive appearance 
 Electrical: Quality electrical manufacturing technology - made of high quality motor oil bearing and automatic over-temperature protection materials, quiet operation, quality long-lasting, longer life 
 Take over the port: round match-style interface, easy operation