Panasonic WhisperFit EZ Bath Fan with Humidity Sensor, model FV-0511VFC1 (Lowe's #4908895). Rated at 0.3 sones for near-silent operation and 110 CFM ventilation power. Built-in humidity sensor automatically activates the fan when moisture is detected, helping prevent mold and mildew. Designed for ceiling installation with a compact, low-profile housing. Item is in like-new condition and comes in original box. Includes the bathroom exhaust fan unit. Energy Star certified for efficiency. Compatible with 4-inch or 3-inch duct.