12小時定時器（適用於全屋風扇及浴室風扇）

I was tired of the bathroom fan running all night, and this wind-up timer solved that perfectly. The 12-hour dial is easy to set and clicks off reliably, which is exactly what I needed.

Installed this in the bathroom yesterday, and I love how the mechanical dial feels so satisfying to turn. The 12-hour max setting is perfect for running the fan all night without worrying about it.

Swapped this in for my bathroom fan's old switch and the 1-12 hour dial is way more useful than I expected. I usually set it around 4 hours after a shower so it dries out the room without running all night. The off position clicks in firmly, which I like.