Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Charging Time: about 3-4 hours, bluetooth Version: bluetooth 5.0, Standby Time: 90 days, Compatibility: Compatible with most bluetooth enabled devices, Transmission Distance: 12-15 meters, Battery: 8000 mAh, Frequency Response: 150HZ—20KHZ, Product Model: P1 bluetooth speaker, Playingtime: 8-10 hours, Weight: 1336g, Package Weight: 1386g, Waterproof: IPX5, Power: 20W*2, Product Size: 32*13*17cm/12.59*5.12*6.69in
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($78.53): BG651551
2. ($78.53): BGBRPL2
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/5cd
Old coupons (from the oldest to the newest): BGBuscape01
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Zealot P1 40W Bluetooth Speaker.
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)).