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Warmth Tip:?

Dear customers， you can select the appropriate serial number to buy，thanks!

Serial Number:?1	Serial Number: 2
??? Serial Number: 3	????? Serial Number: 4
??? Serial Number: 5	???? Serial Number: 6

Hint:
1，When the battery positive and negative anti-loaded， the little fan of wind will blow back， and not the fan of quality problems.
2， Pls prepare two AAA batteries， preferably alkaline batteries.
3. This product contains electronic components， pls not enter the water， or using at the humid environments.