Efficient Cooling System: fan effectively disperses heat, ensuring optimal performance of your electronic and industrial equipment. Precise Speed Control: Features a 4Pin PWM connector for precise speed control, allowing the fan to adapt its speed based on system requirements, resulting in quieter operation and increased longevity. Durable Design: Constructed with double ball bearings, this cooling fan provides a reliable and long-lasting solution to your cooling needs, maintaining performance even under high temperature conditions. Versatile Application: Ideal for use in a variety of settings including computer cases, servers, and more, ensuring your equipment stays cool and runs efficiently.<br><br>Rated voltage: DC 5V Rated current: 0.13A Power consumption: 0.65W Speed: 15000 ± 10% RPM Bearings: Double ball bearings Air volume: 3 28CFM Noise value: 30 5 DBA Expected lifespan: Constant temperature of 40 ℃, humidity of 5%-95%, 50000hours Operating temperature/humidity range: Temperature -10-+70 ℃ Humidity 5%-95% RH Installation diameter: Hole diameter: 3MM Fan blade middle circle size: 16MM Screw hole spacing: Diagonal hole spacing: Around 28MM Hole spacing: 20MM Wiring instructions: red wire positive, black wire negative, yellow wire speed measurement, blue wire temperature control Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour: Black Material: ABS<br><br>Package Contents: 1x Cooling Fan<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.