Delta Electronics / Fans BUB DC Brushless Blower Fans are ideal for high-temperature applications and built to last with a 50,000-hour life expectancy. The BUB series offers sleeve bearings, noise levels as low as 41.5dBA, and an operating temperature range of -10°C to +70°C. Other features include 12VDC rated voltage, 5VDC to 13.2VDC operating voltage range, and 3800RPM to 6000RPM rated speed. Delta BUB DC Brushless Blower Fans have UL Class A insulation and a wide speed control range. Typical applications include projectors, laser projection TVs, projection robots, and projection smart speakers.