Just check coupons out (with price alert and history). You probably want to know what is the best price?
Irrigation Circle Can be can be control by whirl button / and minimum of circle time is 1 minute / maximum is 120 minutes., Batteries 2x 1.5V AAA Batteries （Not include), Irrigation Frequency Can be control by whirl button / and minimum of irrigation time is 1 hour / maximum is one week., Material Plastic
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Sorry, but there’s no price history in my database. You can get coupon down below.
Link: Banggood product page
1. ($23.02): BG589b2e
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGd26f05, BG00c906, BGdbe184, BGf625a4
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Not enough data to show price history chart… $19.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).