Working Water Pressure 0.05-0.8MPa, Size 60x34x49mm, Water Efficiency First Level, Sensing Range Side Sensor 0-5cm/Bottom Sensor 0-10cm, Standby Energy Consumption ≤0.2mW, Protection Grade IPX6, Charging Method USB.
Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB. I found coupon for you. Check this out.
Link: Banggood product page
1. ($15.99): BGcded3b
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGzjiv, Faucet12, BGzji15, aff7off, BG2646, BG4263, BG3088, BGsmartda, e3b176, GBRMN8464, BG4310, BG4860, BG7960, BGAFF10OFF, BGSM63, bGhOnEy10, BGSD4263, BGYJ001, BGFaucet13, BGMY518, BGFH263, BGBR263, BGRXIAODA, BGCZ263, BG18756, BG11518, BGTapsmartda1, 13f142, BGCuponation10, BGHONEY2110, BANGGOODSD, BG79c2c3, BGe717e6, BGHUPG484
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi ZAJIA Automatic Water Saver Tap International ($-3)
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $14.99).
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)).