Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Frequency response: 20-20000Hz, Impedance: 16ohms, SNR: More Than 82dB, Sensitivity: 112dB, Music Time: 2.5H, Package Contents: 2x Headset, 1x Charging Dock, 1x Micro USB Cable, 1x English Manual, 2x Pair of Standby Earbud Tips
Aliexpress
There’re some similar (or not) items on Aliexpress
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Latest coupon code price check (UTC time):
Price history and price alert
Check out price history chart (for all/most countries) for RIVERSONG Air X2 TWS Headset [Fast-23].
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)).