The newly re-engineered Air blade "V," the HU02, is now 30% quieter, but still has a very fast dry time due to an air aperture redesign and reprogrammed v4 motor. Still ADA compliant surface mounted. The innovative back plate design allows the dryer to be detached from the wall for more convenient servicing and filter changes. A proximity capacitive sensor provides more reliable activation when hands are placed near the dryer. Additional Information: Dyson Part No.: 307172-01 (Replaces AB12-N-HV, 307170-01, 304662-01, 301827-01). Power Usage: 208-240V, 50/60Hz, 1400 Watts. Note: This dryer has an operational ceiling of 6,550 feet above sea level.