Interface Type-C, Waterproof IP55, Other functions TWS interconnection, Input parameter 5V=1A, bluetooth Version V5.0, Battery Capacity 2000mAh, Transmission Distance 10m, Working Time (h) 10h, bluetooth protocol HFPIA2DP/AVRCP, Charging Time (h) 1-2h, Connectivity bluetooth, Microphone Yes, Model XMYXO4WM.
Basically copy coupon, view price history or create e-mail price alert. What is 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. Coupons for Xiaomi XMYXO4WM Bluetooth 5.0 Speaker? Nope, there’re no coupons 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): BG9NY, AFfbG10, EARSP11, BGAFF10OFF, BGXMXY022, bGhOnEy10, BGXMSD01, bgshOOp10, BGELIG0920, BG11SHOP, BGXM95, BG4BW25, BGLOAC1, 13f142, 451feb, BGBRPL2, BGbbd3af, BGHOTSHOP15, BG53e9c8, BGAlerabatKL, BGb7eb38, BGd173b4, BGAudioVideo, BGAUDIO, BG9ba0e8, BGissam77A, BG1b5830
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi XMYXO4WM Bluetooth 5.0 Speaker. The lowest price was: $13.99.
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)).