Final price reduction. It works if you put in a battery. However, the time drifts. Therefore, I recommend using it for display purposes, etc. I had it attached to my school bag for about a month. It's a little stiff, but it opens when you press the top. The protective film on the glass part inside has not been peeled off. The silver part on the back was peeled off from the time of purchase. When replacing the battery, you can open it from the indentation on the side and replace it. I plan to ship it with the battery removed. I haven't checked the battery compartment, so there is a possibility of leakage. As of September 1st, it is working properly. It takes LR626 batteries. Packaging method: It will be placed in a box and shipped with water damage protection.