Addition to this junk
After a few months it stopped to produce ozone at all.<br />I opened this, so called, “device”, and found that green wire supplying high voltage  PLUS to the plate  is DISCONNECTED! First, it shows that Chinese do not know how to marker plus and minus wires. Negative, which goes to sharp end of ozone attachment, has white color, and positive – green!<br />Second, they made this connection so idiotically, that it disconnected itself!<br />So, I attached again this plus green wire to the plate and it began to produce small amounts of ozone.  Since it's rechargeable battery has very low capacity I leave it connected ALL OF THE TIME to charging appliance and it works! As usual, China's junk!
Rating: 2 stars