Under normal conditions, higher humidity levels rise and settle toward the top of your humidor. The HumiFan™ provides intermittent air circulation to prevent stagnant conditions inside your humidor, allowing your cigars to "breathe" by redistributing the air inside your humidor to diffuse inconsistent humidity levels, providing a more consistent and stable environment for your cigars. Features: Fan runs in 15 second cycles every 15 minutes; Angled centrifugal fan maximizes air circulation; Oversized side intake for maximum air redistribution; LED Battery Status Indicator; Batteries included (Four AA batteries); Dimensions: 5.9"W x 2.95"H x 0.98"D