Only 3w x 3d x 7h. but packs all thefeatures of larger metered dispensers. Program desired spray at 15-. 30- or 45-minute intervals. Controls odors in rooms up to 6000 cu. ft.I10-ft. x 20-ft. x 30-ft I for 15 to 45 days I depending on the selected spray interval). Visual !LED) refill and battery replacement indicator. Operates up to two years on two C batteries !not incl.). Mounting tape and screws included. Manufacturer's five-year warranty when used withTimeMist® Ultra Concentrated Refills !sold separately). White/Gray