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Your cart is empty.1 Size: 38mm (length) 22mm (W) 14mm (height) 2 Weight: 8g 3 Operating voltage :3.3 - 5 .5 V 4 clock chip: high-precision clock chip DS3231 5 Clock Accuracy :0-40 Degree range, the accuracy 2ppm, the error was about 1 minute 6 calendar alarm clock with two
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