Wire length 2200mm±15mm, Speaker size 50mm, Color Black, Impedance 32Ω±15%, Plug USB, Distortion rate 3%, Sensitivity 110dB±3dB, MIC size 6.0*2.7mm, Brand ONIKUMA, Frequency Response 20Hz-20KHz, MIC Sensitivity -42±3dB, MIC Impedance 2200Ω, Model K10(7.1Channel).
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Aliexpress
There’re some similar (or not) items on Aliexpress
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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 is one coupon right now! Check this out.
Link: Banggood product page
1. ($22.81): BG975636
coupon code has to be applied in shop’s 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/i1u
Old coupons (from the oldest to the newest): BG2b9775, BGHOTSHOPHM, BG00cae4, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, BG83f6cb, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGcoupon8off, BGGutscheine, BG00c906
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Onikuma K10 7.1 Gaming Headset. The lowest price was: $19.99.
Price records source(s): 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)).