We’re not sure if this gadget is going to catch on, but we found it fascinating nonetheless. It’s the Mini Castle Earlarm, a personal, tiny timer you wear in your ear. Use it to remind you when the muffins come out the oven, to wake you when you’re nodding off at work on the subway or while studying for exams, to alert you to take your medication, and we’re sure there are myriad other uses. The coolest thing is that the Mini Castle’s alarm doesn’t disturb others—just you. We’re just wondering how well the Mini Castle stays in the ear, as not all ears are shaped alike. Available now for $15 USD.