with Mic, One Key to Control, Hands-free Call, Frequency response: 20~20KHz, Driver unit: 10mm, Impedance: 16ohms.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
I could not find it 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. There are no coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): e2bcea, TTxBG10, 2019SPEDM, BG3CSUM, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, EARSP11, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGSS10%SW, BGELIG0920, BG11SHOP, BG4BW25, BGLOAC1, BGa0b145
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – UIISII C100 Earphones White ($-3)
Price history and price alert
Price history (for all/most countries) for UIISII C100 In-ear Earphones is here. The lowest price was: $0.99.
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)).