TWEMCO QT-30R This is a junk item. I think the item itself is relatively clean. I was using it until recently. Operation confirmed. ⚠️It works, but the time gradually drifts, and I was using it daily with a drift of about 13 minutes.⚠️ The sticker on the back is slightly peeled. Since this is a used and junk item, please only consider it if you understand this. I have saved a video of it in working condition.