Magnetic levitation: max frequency of 40000rpm, the max twisting force of 270gf.cm, the max swing of 5.5mm, Charging time: full of 6 hours, Battery life: 60 days, Battery capacity: 2600mAh, Waterproof Rate: IPX7.
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Updated:
Banggood
Warehouse in Europe 
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Link: Xiaomi Oclean SE Sonic Toothbrush [EU]
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
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Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi Oclean SE Sonic Toothbrush ($-3)
2. China – Xiaomi Oclean SE Sonic Toothbrush Blue ($-3)
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 $52.99).
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)).