Efficient Cooling System: blower 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 . 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. Rated voltage: DC 24V Rated current: 0.75A Power consumption: 18W Speed: 4024 10% RPM Bearings: Double ball bearings Air volume: 45CFM Wind pressure: 55MMH20 Noise value: 61DBA 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: 4MM Fan blade middle circle size: 47MM Air outlet size: 60 X 32MM Air inlet size: 79MM 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 not affect use Colour:Black Material:ABS Package Contents: 1 x Blower Fan 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.