A9460 Dryerjet power vent , vent booster, For Clothes Dryers with a long exhaust line. When the dryer exhaust has a long run to the vent it increases drying time, electricity usage and wear and tear on the dryer. 15.5 inches long/Tall 6 inches wide 4 Inch inlet / outlet 10 foot cord Easy Install 9460, No on-site wiring. The 9460 turns on and off when the dryer turns on and off . . . automatically. Air Pressure Sensing Switch (PS-35) is mounted on fan and pre-wired at factory with 10-foot line cord. Includes probe. Just Plug it in. Ball bearing motor out of air stream. No lint on motor The DryerJet has been tested on runs up to 50 feet of duct and up to four 90° bends. Testing was done by an independent lab at Florida International University. Tested to CSA standard C22.2 113-M 1984