Sanyo Denki San Ace 120AD is a 120 x 120 x 38mm AC DC fan. This fan features low power consumption, extended operating temperatures and the industry's longest life span of 60,000 hours (approximately 6 years). San Ace 120AD from Sanyo Denki operates by internally converting AC power into DC power, providing the superior performance of a DC fan with the flexibility of a wide AC input voltage range. With a rated voltage range of 100 - 240 VAC, the fan can be used in both 100 VAC and 200 VAC systems. Rotation speed remains constant even at different input voltages.