Fun build. The instructions are sufficient but require special attention from you. I had to go back a few times but it was easily fixed. The clock is powered by one AA battery (not included). The gears for the month, date and day are MANUAL but this is stated in the product description. (See video demo.) One of the "day" gears was too small so it spins out of gear, but being manual it doesn't affect performance so I gave it 4 stars. It was a joy to build and beautiful on the wall. I will not use it for date tracking or anything like that. Simply a fun wall piece and eye catcher that tells the time.
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