I bought this on Rakuten for around 12,000 yen this year. It's in clean condition with no noticeable stains. Please prepare two AAA batteries. Operation has been confirmed. My child, in the middle grades of elementary school, was wetting the bed every night and had to wear diapers every day. We tried drug therapy for over a year, but it had no effect at all. I hesitated to buy a bedwetting alarm because they are expensive, but in the end, I wish I had bought one sooner. After using the bedwetting alarm, the number of nights without bedwetting increased within about a month. My child was overjoyed the first time they didn't wet the bed. The first time, I set the alarm with both sound and vibration, but the child didn't wake up at all, so I changed the setting to vibration only the next day. As the number of nights without bedwetting increased, we stopped using the bedwetting alarm in the second month. Now, they can wake up and go to the toilet on their own at night. I hope this helps those who are struggling with bedwetting. Thank you for looking.