This is a novelty timers, just like a real hamburger!
Easy to use, simply turn clockwise to the time needed
Spring-driven, no battery required
Long and loud bell rings
Timing range: 1 - 60 minutes
Suitable for timing for cooking, nap, exercise, study, etc.
http://www.monde-tech.com/product_info.php?cPath=98&products_id=2737
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