$9.99 – Digital Alcohol Tester LCD Display High-precision Breathalyzer Professional Alcohol Breath Rechargeable Alcotester Drunk Driving Test – #1.
Latest update shows that Digital Alcohol Tester LCD Display Breathalyzer costs $9.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($9.99)
Banggood warehouse is located in China. Well, is it a good price anyway? Cool, average is $11.25, so current price is lower! There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Price without coupon: $10.99
1. ($9.99): BG5c7ab6
apply it in your cart 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): BG28a357, BGAMMT03
(I don’t think these’re gonna work, but you can try ’em out anyway)
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.
Price history and price alert
Price history (for all/most countries) for Digital Alcohol Tester LCD Display Breathalyzer is here. The lowest price was: $9.5.
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)).