$12.99 – Digital Alcohol Tester LCD Display High-precision Breathalyzer Professional Alcohol Breath Rechargeable Alcotester Drunk Driving Test – #1.
When I was updating this page the price was $12.99 for Digital Alcohol Tester LCD Display Breathalyzer (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($12.99)
Banggood warehouse is located in China. I have no active coupons for you right now. Is it expensive? Well, this price is higher than average price ($11.25)
Link: Banggood product page
Price: $12.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG28a357, BGAMMT03
(these coupons are old, so probably won’t work)
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)).