Thank you for viewing. There are no noticeable stains, and the operation has been confirmed. Used for about 2 months. Retail price: 34,650 yen Negative Ion & Ozone Air Purifier Dr. Air Vital DAV-401 Trinity Energy ■Features■ ● It can decompose and suppress invisible viruses, house dust, and unpleasant odors and bacteria in the room with the power of negative ions and low-concentration ozone. ● It not only removes dust and pollen, but also creates a healthy and relaxing space by generating negative ions, which are abundant in nature such as clear forests. ● It is silent because it does not use a fan or motor. ■Specifications■ ● External dimensions: W201 x D105 x H98mm ● Body weight: 516g ● Power supply: AC100V (50/60Hz shared), DC12V ● Power consumption: 5W ● Discharge method: Corona silent discharge ● Generated ion concentration: 6 million units/cm3 or more (outlet) ● Generated ozone concentration: 0.05ppm or less ● Recommended applicable space: Approximately 6-10 tatami mats (normal mode), less than 5 tatami mats (eco mode)