Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Bluetooth version: 3.0 + EDR, Frequency: 2.4GHz, Battery type: 450mAh Li-ion battery
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I have no active coupons for you right now.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGBTS3, TTxBG10, BGBT3S, BgAuMotor, BG25MOTO, BGMotor32, BGmotor9, BGMoto83, Automo, BGMoto99, BGMotor1111, BG18SFMP, BGAutos, BGHU665, BGBTS315, BG15RPP, BGINMO, BGCARELEC, BGME11, BGAFF10OFF, BGMoS39, BGBTS31, BG28MO3IN, BGCuponation10, BGS2279, 13f142, BGHONEY2110, BGEG11, BGwhielabel, BGHLS3, BG79f076, BG10OFFAFF1, BANGGOODSD, BGMOTO478, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, MVC8SPRING, BG440578, 8BGwbg2204, tRaDetRaCKeR, BGAUTO22, BGd7fe21, BG3d6d84, BGdcbfa8, BGc17ca5, Cuponation9, 9OFFSUMMER, BGSCM75
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BT-S3 Motorcycle Intercom Black [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for BT-S3 Motorcycle Intercom Black.
Price records source(s): Gearbest, Banggood
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)).