Purchased new in 2020. It cost around 17,000 yen. The wall-mount adapter is missing. Used for about a year and a half from 2020, and for about six months in 2023. Operation confirmed on 2025.03.28. When charging the monitor, the orange charging light turns off quickly. However, when the monitor is turned on, the battery level immediately decreases by one bar, so it may not be able to fully charge. According to the manual, the battery pack is a consumable item (P16). Therefore, the battery pack's lifespan may be nearing its end. If the monitor is connected to an outlet, the charging mark appeared and it could be used. A while ago, there was a problem where the camera direction on the monitor couldn't be changed, but it was fixed. When I used it again after the birth of my second child, the problem was gone, and I could operate it with the monitor. However, this is a product that has had a problem once, and there are concerns about the battery pack's lifespan. While using it, I often felt that the temperature sensor was unreliable. I haven't checked all the functions, so please understand that there may be other problems. Please purchase only if you understand that this is a used item. It was helpful when my first child couldn't open the door yet, as it saved me the trouble of going to check. I didn't use it much for my second child because I woke them up at the same time as the older child.