CL7 METERED AEROSOL DISPENSER - Uses 2 C batteries. Lasts over one year depending on settings. Slim compact unit with a variety of features and functions to meet your odor elimination needs. 3 interval settings, 7.5, 15, 30 minutes. Key lock mechanism; 24 hour/night/day. Red light symbolizes empty can. 8 1/2" height.