You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Battery Capacity 365 Day 2000mAh, Application Car / bicycle / ball / swimming ring / etc., Product power 80W, Inflation Pressure 150 PSI, Brand BIKIGHT, Function Inflation / lighting / tire pressure monitoring / intelligent digital display / distress signal, Weight 600g, Unit Display KPA / BAR / PSI / KG/cm2, Battery Time 25 Minutes, Size 55 X 50 X 235mm, Name Wireless Inflatable Pump, Standby Time 365 Day, Input Port MicroUSB 5V/2A
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon 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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGC202G, BG10OFFAFF, BGwhielabel, 13f142, BG10OFFAFF1, BG4d9120, 00c906, BG061b89, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for BIKIGHT 12V 150PSI Electric Air Pump is here.
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)).