An innovative device utilizes ionic technology to generate ozone (O3) & anions to purify the air thoroughly. 1. Neutralize stale and foul odors with fresh air inside refrigerators, closets, bathrooms and cars, etc;2. Kill all kinds of bacteria to avoid the growth of mildew;3. Very ideal for use in refrigerator to keep the foods fresh for longer time;4. Built-in micro CPU intelligently controls the operation cycle & mode by one touch and indicates with the colored LED;5. Operated by 3 AA batteries. Low voltage indicator reminds you of replacing batteries.