Theory of Using- The decanter is to help us speed up the oxidation process of red wine and oxygen, reduce our waiting time, and is very suitable for festival and family party. Before using, need to open the switch of aerator switching valve, so that the red wine extracted is oxidized. Safe Material- Plastic hoses that contact with wine are harmless to our body, so you can use them with confidence. Easy to Use- Slightly press the dispenser button to release the wine, it could control the amount of liquied in the wine glass according to your pressing time. Equal Price-performance Ratio? -Our products require you to purchase 4 pieces of AAA batteries yourself to install in our wine aerator, but compared to USB charging, 4 batteries also can press the dispensing button(hold for 4 senconds once time) more than 3000 times, that is to say, you could aerated total 40 bottles of wine with our products, and meanwhile, you also could replace new batteries when batteries are broken out, but USB charging can not do that.