?Wide application?this cooling fan proves invaluable when your electronic equipment or confined spaces begin to overheat. Effectively cooling down devices and facilitating air exchange, it efficiently circulates air to keep your electronic equipment and other compact areas, such as spaces for animal and plant growth, at optimal temperatures. Whether it's your Xbox, PS4, sound system, amplifier, radio, receiver, audio equipment, server, refrigerator, internet gateway, computer case, vintage sink closet, dried meat box, DIY humidifier, or any other device or space in need of cooling or improved air circulation, this cooling fan provides a reliable solution... ?Bearing Option&Working Life?The 120x120x25mm/4.71"x4.71"x1" cooling fan offers a choice of bearings, with a durable double ball bearing and a pure copper coil motor ensuring smooth operation and extended lifespan. Designed for reliability, these fans boast an operational lifespan of up to 50,000 hours. Additionally, their versatile design allows for both vertical and horizontal installation configurations. ?Safe to operate?Featuring double-sided metal fan grilles, this unit ensures operational safety by effectively shielding both hands and fan blades from accidental contact. During operation, aligning the 180° directional air outlets parallel to electronic equipment or confined spaces allows optimal airflow. This configuration effectively dissipates heat from electronic devices or vents' surfaces, ensuring sufficient airflow to maintain optimal temperature levels within the designated area. ?Variable Speed & Air Flow?These cooling fans' variable speed and airflow capabilities, controlled via an AC plug speed controller, offer versatility to optimize performance according to specific preferences. Operating at 100% speed ensures maximum airflow while reducing speed to 30% maintains an acceptable noise level. With a speed range from 900RPM to 3000RPM, adjustment is easily achieved by manipulating the Stepless controller, varying voltage output from 3V to 12V. Additionally, convenient ON/OFF functionality is provided through a dedicated switch on the controller. ?Warranty&Technical support?Our warranty, except for non-human damages, is for one year, during which customers are entitled to receive a replacement unit. Furthermore, we offer lifetime technical support and comprehensive after-sales service. Should you have any inquiries or concerns, please do not hesitate to contact us.