♠ Excellent use for bathroom ♠ Improved high performance condenser motor with long life bearing ♠ New advanced blade design for high air volume and low noise level ♠ Low power consumption (50% down VS previous model) ♠ Strengthen Shutter Structure for better durability ♠ Installed directly into the glass window (window panel thickness from 3mm-7mm) ♠ Cord operated shutter