KZ Bluetooth Module Upgrade Detachable Cord (Banggood, Aliexpress: for ZS3 / Low Battery Alarm / On-cord Control / English and Chinese Voice Prompt (the best price with coupon)).
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Price history and price alert
Price history (for all/most countries) for KZ Bluetooth Module Upgrade Detachable Cord is here. The lowest price was: $2.99.
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)).