Basically copy coupon, view price history or create e-mail price alert. Best price?
Support the last number redialing, Up to 300 hours standby, call answer, Call out, Up to 6 hours talk time when using the intercom feature, up to 10 hours talk time when connected to cell phone, Support audio transfer, call hang up, Receive a cell phone call automatically, Built-in 400mAh Li-ion battery, call reject
Aliexpress
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Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Here is price history (for all/most countries) for Gocomma BT-S2 1000m Intercom.
Price records source(s): Gearbest
Click on image to enlarge.
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)).