Moving head: 60 ° automatic shaking his head right and left, Battery capacity: 4000mAh, Material: ABS+PC, up and down 27 ° manual adjustment, Power supply mode: Type-C interface, USB charging, Wind speed: 3 Speed, Weight: 522g.
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($34.99): 13f142
put item in your cart and apply coupon code there 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): Brand2, vipupgrade8, BGMIB2, 502C6B, BGSLFAN, bGhOnEy10, BGSS10%SW, BGSLVFAN, bgshOOp10, BGSLVOFAN, BGHome15%, BGHOMEAPP13, BGHOMEA13, BG10OFFAFF, BGwhielabel
(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 Xiaomi SOLOVE Desktop Fan 4000mAh is here. The lowest price was: $16.99.
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)).