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 – 40KHz, Impedance: 10ohms, Sensitivity: 106db
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
XINHS 16 core single crystal copper plated silver blue gray KZ KZZSX ZSN ES3 KC2 upgraded cable | $19.65 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($17.49): BG11SHOP
2. ($18.22): 13f142
3. ($18.22): BGELIG0920
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): e2bcea, TTxBG10, 2019SPEDM, BG3CSUM, bgssaff9, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, EARSP11, BGMPB2020, BGAFF10OFF, BGTT10, bGhOnEy10, BGSS10%SW, bgshOOp10, BG4BW25, BGLOAC1, BGa0b145, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15, BG53e9c8, BGAlerabatKL
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – KZ KZ-ES3 Earphones Black/Purple With Mic ($-3)
Price history and price alert
Price history (for all/most countries) for KZ KZ-ES3 Earphones Blue Black Without Mic is here.
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)).