$11.99 – SGS05 Digital Water Flow Meter High Accuracy IP6X Waterproof Four-mode Measure Water Consumption and Flow Rate for Outdoor Garden Watering Irrigation Hose.
I have just checked coupons. The lowest price I could get is $11.99 for SGS05 Digital Water Flow Meter (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($11.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Good or bad price? I have never seen better price than the current one in CouponsFromChina database, so it’s the best!
Link: Banggood product page
Price: $11.99
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
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
Do you need price history chart (for all/most countries) for SGS05 Digital Water Flow Meter? There we go. The lowest price was: $11.99.
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)).