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3.7V professional motor, low vibration, and ceramic blade, Rechargeable and cordless: lithium-ion cordless power, up to 4 hours runtime after a full charge
Aliexpress
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Price history and price alert
Check out price history chart (for all/most countries) for Warmlife Professional Electric Hair Trimmer.
Price records source(s): Gearbest
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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)).