Includes a 12V power adapter with variable speed and on / off switches, allowing customized airflows for optimal ventilation and cooling Built with double ball bearings and noise reducing technology ( 52dB), ensuring smooth operations and long lasting reliability in demanding environments Features a 117mm duct adapter for easy installation in 120mm round pipes, ideal for small grow tents, 3D printer cases, and purification in welding or sprayer booths Supports AC100V-240V input, making it suitable for global use in DIYer projects, hobbyist workshops, and professional electronics maintenance This standard 120mm exhaust fan delivers 2800RPM speed and 82CFM airflows, efficiently reducing equipment temperature for welding stations, 3D printer enclosures, and electronics workbenches, Manufacturer: FHGSPQWM