$24.99 – Sensor Advanced Semiconductor Oxide Alcohol Sensor, Response time Within 5 Seconds, Warm up time Within 10 Seconds, Brand Lydsto, Powered 3 AAA Batteries.(Not included), Color Black, Detect range 0-0.199% BAC; 0-1.990‰ BAC; 0-0.995mg/L, Item size Approx. 112 * 61 * 29mm.
When I was updating this page, then coupon price was $24.99 for Lydsto Digital Alcohol Tester (in Banggood). Check coupons or create price alert down below. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($24.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Price? This price is higher than average price ($16.69) for this item.
Link: Banggood product page
Price: $24.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGPDhome31, BGJUOT639, BGMU639, BGLYTD639, BGTYF639, BGTYCZ639, BGTYOD639, BGSPHOME24, BGTYSR639, BGPTSR639, BGTYOB639, BANGGOODSD, BGTYOT639, BGUdb33, BGUbf28, BGTYOK639, 00c906, BG00c906, BGHealth10D, 2022ACTIESNL, BGHB218, tRaDetRaCKeR, BGHECARE1, BG4ee866, NewYear100
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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
Here is price history (for all/most countries) for Lydsto Digital Alcohol Tester. The lowest price was: $15.39.
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)).