How to use: The mechanical timer has no battery, it needs to be wound up to 55 (no more than 55) each time, and then wound up to set the time you want; please be sure to read and follow the setting instructions; Winding to 55 will ring for 5 seconds, if not winding to 55, it will only ring for 2 seconds - Great for kitchen lovers, not only as a dial timer but also for home decoration, you will love this cute and practical friend. The machine is handmade,there is a certain timing deviation of +/-5%, the timer must be wound manually. internal mechanical movement; ABS-Smooth Touch: All interfaces are carefully polished, no sharp points, cute things can put it in the room, office, kitchen. Manage Your Time: Helps you learn time management, especially cooking, baking, brushing teeth, reading, studying, coffee and tea time, etc. A great gift for your family, friends, the cute timer can brighten up your and your friends' life, makecooking learning work fun! The chronograph must be wound manually every time, first clockwise to 55 minutes, then counterclockwise to set the time. Turning counterclockwise from 0 will damage the mechanism.