Thank you for viewing. I purchased this about three years ago and used it for about six months. I used it while keeping it clean, but the hose is yellowed due to the effects of the medication (photo 5). Please understand. Photo 4: The parts in front of the main unit are unused. The medication cup that was used can still be used, so I will attach it to the main unit. I have confirmed that the main unit works properly. Please note that it may not spray depending on the amount of medication. (I once contacted the manufacturer because it didn't spray after the amount of medication was increased, and I thought it was broken.) There are handwritten notes on the back of the instruction manual (photo 7). As this is precision equipment, I will ship it in its original box.