• 4" DC Duct Fan: This 4 inch inline duct fan is designed for use with 12V DC power source. The fan power cord terminates with /-/PWM pin wires. No battery or power supply included
  
• ENERGY SAVINGS: Built with cutting edge brushless DC motor and dual jet type impeller, our new 4" DC100-12V fans deliver 141 Cubic Feet per Minute (CFM) of Airflow using only 21 Watts
• QUIET & SPEED ADJUSTABLE: This fan can contains PWM driver which can be used to adjust the speed of the motor (PWM controller not included). The fan's speed can also be adjusted by reducing the input voltage. 
• ALUMINUM HOUSING: Resists accidental damage, harsh elements and reduces maintenance in demanding applications such as ventilation of grow tents, gardens, farms, crawl spaces, attics, etc
• COMPACT: Only 6.25" (L) x 7.25" (W) x 5.9" (H). Ideal for applications with minimal space available. Installation hardware (screws and anchors) included in set