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The intelligent chip is powered by 1x CR2032 battery (built-in)
Aliexpress
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Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $39.99).
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).