Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the ozone ppm output rating is on this?
Document: I can measure a surprisingly high ion output 180 degrees in all directions around the brush (no focused beam). I am sure that it encloses my whole head much better that the focused beam of other devices hitting my chin. No ozone to detect. Brush should keep a very long time.
I have many ionizers, also a couple of different wearable ones. I also have a professional ion counter to actually measure the output.All the other wearable ionizers use a needle to emit the ions.
whenever I attend seminars when there are a lot of people around, I take it with me to wear around my neck. I don't know if it's working, but the blue light sure is on. The speakers noticed it also. But I just need fresh air to give me a peace of mind.
when I received this item, it looked like been used. It stopped working in 2 weeks. The blue light is not on any more.
my personal air purifier is great, I use it on plane or at hotels, anywhere to avoid strong chemicals or perfumes.
i have the mini mate which comes in black. i ordered this because it was white and a bit less obvious at work with some of my outfits. It does not produce anything like the mini-mate. I had to put it right next to my nostril to feel that yes it is moving some air but no ionizer &#34;scent&#34; to it and certainly not enough produce to be hanging around your neck. Save your money!
good quality.A302 has been fell on the floor once but still work normally after put the battery back.feel better in a long distance bus with Airtamer on.
While I did not buy my Filter Stream 302 on Amazon, I am extremely happy with the product. Having a compromised immune system means I am highly susceptible to anything in the air around me, particularly when I fly. I have used this air cleaner on international and domestic flights and find that not only do I stay healthy, I arrive more refreshed. The item is good for flying and anytime you find yourself in a crowded place (cruise ships, malls, trains, etc).
Whenever I would travel I had always been sick within 3 days of arriving back into Australia from the plane being sprayed an hour before landing. Flu like symptoms and very sick. Since wearing the AirTamer Ionic Travel Air Purifier I have no longer been sick. I almost feel sorry for the other passengers. In fact last time I travelled home from Hawaii I was home 5 days before I realised &#34;hey I feel great&#34;.
When I first got the unit, I installed the batteries and wore it from 5 am until 7 pm each day for 7 straight days. Then the batteries went dead. Locally it cost almost $10 for the two batteries, which would equate to $40 month if I had to wear the unit all day. That is the only downside. My option is to use the unit only where I need to control my coughing/sneezing and leave it off most of the day. Suggestions would be appreciated.
Answer: Website says 4.4 parts per billion