I am a semi professional macro photographer and take pictures of all kind of things with ultra close ups.  I saw this advertised and figured if it didn't work, I would have only been out $4.00.  I wasn't wrong about being out the four bucks.  I was impressed with the packaging the cleaner was sent in and again impressed to see that the box containing the cleaner was intact.  I took out the "Sonic Cleaner" and was looking for the cleaning agent and batteries as was advertised in the listing.  What I got was a removable plastic tub and the main unit.  It doesn't operate on sonic waves.  It is a small unit with a motor inside that vibrates.  I put in a coin and water.  After five minutes, I took out the coin and it was the same.  If it sounds too good to be true, it is.  Don't waste your money.  You can do the same thing by dropping a coin into a glass of water.