Just check coupons out (with price alert and history). What is the best price?
Standby Duration: 200H, Charging time: 1.5H, bluetooth Chip: QCC3003, bluetooth Version: 5.0, Impedance: 32Ω, Life time: 7H, Frequency Scope: 20-20KHZ, Recharging current: 100mA, Horn: 10mm+10mm, Waterproof Level: IPX4, Operating Voltage: 3.7V, Sensitivity: 94dB, Charging interface: Micro USB, Distance: 10m
Aliexpress
There’re some similar (or not) items 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. As you can see I didn’t find any active coupon for this product right now…
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGW300BT, AFfbG10, 502C6B, BGBK15, BGNAW300, BGVDay10%off, EARSP11, BGAFF10OFF, BGTT10, bGhOnEy10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Edifier W300BT Bluetooth 5.0 Earphones.
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)).