Check coupons or create price alert down below. You probably want to know what is the best price?
Working range: 3 – 7.5 V, 0 – 3 A, Resolution: 10mV, 1mA, Error: Voltage less than + / – 1pct, current less than + / – 2pct, Full range voltage drop: 200mV (current detecting)
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):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($2.35): BGAFF10OFF
you should apply the coupon in your 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): e2bcea, TTxBG10, 2019SPEDM, bgssaff9, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGMPB2020, bGhOnEy10
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for KW201 USB Power Current Voltage Tester.
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)).