Charging Bin Capacity: 300mAh, Active Noise-Cancellation: No, Style: Half In-ear, Sensitivity: 109, Impedance Range: up to 32, Connectors: Type c, Earphone Battery Capacity: 30mAh*2, Charging Time: 1.5h, Color: Black, Brand Name: MONSTER, Frequency Response Range: 20 – 20000, Vocalism Principle: Dynamic, Model Number: XKT01, Communication: wireless, Charging Port: Type C, Charging Method: Charging case, Bluetooth-Compatible Version: 5.2, Music Endurance: 4-5h, Calling Endurance: 3-4h.
Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($28.97): BGAudio9
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGAudio3
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for Monster XKT01 Bluetooth Earphones? There we go. The lowest price was: $17.99.
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)).