Check coupons or create price alert down below. You probably want to know what is the best price?
Impedance 32Ω, Microphone Yes, Wearing Type In-ear, Cable Length (m) 1.25m, Wired Control Support, Model HSEJ04WM, Brand Xiaomi, Color Black, Frequency Response 20-20KHz, Net Weight (g) 15g, Plug Type Type-C
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($16.99): BGAlerabatKL
2. ($16.99): BGAUDIO
this code has to be applied in your cart 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): BGXMTYPE, TTxBG10, BGXMTYPE2, aff7off, BGTYPE, BG3CSUM, BGTYPEC, bgssaff9, AFfbG10, BGTC001, BGXMTC30, BGXMMTC, 502C6B, BGPISTONPL, BGPiston0109, BGVDay10%off, EARSP11, BGTT10, bGhOnEy10, BGXMTYE, 13f142, BGSS10%SW, bgshOOp10, BGELIG0920, BG11SHOP, BG4BW25, BGLOAC1, BGa0b145, BG725cc4, BGBuscape01, BGb952e7, BGBRPL2, BGHOTSHOP15, BG53e9c8, BGd173b4, BGAudioVideo
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Piston Type-C Earphones? There we go.
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)).