What is EC technology?
EC stands for Electronically Commutated and it combines AC and DC voltages, bringing the best of both technologies
The motor runs on a DC voltage, but with a normal AC supply.
DC motors already have low power consumption but if used in an AC application
The power needed converting AC to DC, using a bulky, inefficient transformer.
The EC motor incorporates voltage transformation within the motor.
The non-rotating part of the motor (stator) is extended to make room for an electronic PCB board which includes power transformation AC to DC, as well as the controls.

Specification
Rated Voltage: 90-270V
Power: 1.5Watt
Speed: 4700 ±10%RPM
Air Flow: 23.6 ±10%CFM
Noise: 36.5±10%dBA
Cable Length: 300mm (11.8 inchs)
Weight: 52g/pcs

Package include:
1 Piece fan include fan grill and mounting screws & nuts
2* leadwires（about 38 inches).
1* Power Plug
Package include: 1 Piece fan include fan grill and mounting screws & nuts; 1* Wire Clips; 1* US Plug Power Cord
This fan can easily run from 90 to 270VAC current without any trouble.
60x60x25mm AC 110V 115V 120V 220V 240V; Speed: 4700rpm; 1.5W
The motor runs on a DC voltage, but with a normal AC supply. DC motors already have low power consumption but if used in an AC application
Dual-ball bearings have a lifespan of 50,000 hours and allows the fans to be laid flat or stand upright.