Delta Breeze, 70CFM/2.0 Slim Humidity Fan, Built For Easy Compact Installation, Controls Bathroom Humidity Effortless, Compact Housing Size Of 7-1/2" x 7-1/4" x 4", Can Be Set To Operate In Either Of 2 Modes, Humidity Sensing Or Full Speed, LED Indicator Light Is Blue When In Humidity Sensing Mode & Amber When In Full Speed Mode, DC Brushless Motor Is Designed For Long Life & Low Power Consumption.