Just check coupons out (with price alert and history). What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Cable Length (m): 1.2m, Driver unit: 10mm, Frequency response: 7Hz – 40KHz, Impedance: 32ohms, Sensitivity: 104dB
Banggood
Banggood warehouse is located in China. Coupons for KZ ZS10 Hybrid Earphones With Microphone? Nope, there’re no coupons in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): d4de0b, e2bcea, TTxBG10, aff7off, BG3CSUM, bgssaff9, AFfbG10, affbg10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, EARSP11, BGAFF10OFF, BGMPB2020, bGhOnEy10, BGSS10%SW, bgshOOp10, 7d18f7, BGELIG0920, BG4BW25, BGLOAC1, 13f142, BGa0b145, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15, BGAlerabatKL
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – KZ ZS10 HiFi Hybrid Earphones Black NoMic ($-3)
2. China – KZ ZS10 Earphones Red NoMic ($-3)
3. China – KZ ZS10 Earphones With Mic Blue ($-3)
Price history and price alert
Here is price history (for all/most countries) for KZ ZS10 Hybrid Earphones With Microphone.
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)).