Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Transmission Distance ≤10m, Working Time (h) 8h non-stop music playing, Battery Capacity 2000mAh, Output Power 3W*2, Impedance 4Ω, Charging Time (h) 4h, Microphone Yes, Frequency Response 40Hz-20KHz, Bluetooth Version 4.2, SNR ≥75dB, Standby Time (h) Around 40h
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. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($15.78): TTxBG10
apply code in your basket (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): 502C6B, e2bcea
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for LESOI F1 Bluetooth Speaker is here.
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)).