The OMRON NE-C28 aspirator, with a power consumption of 58W, allows for efficient aspiration. - Brand: OMRON - Model: NE-C28 - Power Supply: AC100V - Power Consumption: 58W - Accessories: Mouthpiece, tube, instruction manual - Country of Manufacture: China Thank you for viewing. I used the inhalation mask, but the mouthpiece is unused. My child used it for about a year, and it has been stored at home since it was no longer needed. I don't think there are any particular stains, but please sterilize it with boiling water before use.