You can get Baseus Automatic Alcohol Tester for $26.99 with coupon (from Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest price update (UTC time):
Brand Baseus, Input 5V/0.12A (Max), Size 25mm*80mm, Certificate CE /FCC, Charging port Type-C interface, Weight ≈292g, Charging time About 2-3 hours, Accessory Type-C interface data cable 1m black, Model CRCX-01, Color Black, Name Baseus Digital Alcohol Tester
Banggood ($26.99)
Banggood warehouse is located in China. I think you want to know if the price is good. This price is higher than average price ($23.07) for this item. Well, there is one coupon available right now.
Link: Banggood product page
Price without coupon: $29.99
1. ($26.99): BGAMMT03
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): BG64e922, BGRepair63, BGcacc8c, BGHU1347, BG683ab7, BGGR4406, BGHU4408, BGIS4406, 2022ACTIESNL, BGc9376d, BG3Ydc12, BG92577c, BG1efeb0, BG9e13d7, MVC8SPRING, 8BGwbg2204, BGSCM75, BG436012, BGe3e51b
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Baseus Automatic Alcohol Tester.
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)).