I have checked all old coupons and price is 28.99 USD for WiFi 14 In (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Banggood (28.99 USD)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Good or bad price? Awesome! This price is the best in CouponsFromChina database!
Link: Banggood product page
Price: 28.99 USD
28.99 USD – This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Coupon (18.4.2024, $29.99): BGRAPPM10
Item: WiFi 14 In 1 Air Quality Detector
Countries: Greece
Old coupons (from the oldest to the newest): BGTOOS729, BG5d6371
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for WiFi 14 In 1 Air Quality Detector on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for WiFi 14 In 1 Air Quality Detector? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).