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.
You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
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. One coupon is available. Cool!
Link: Banggood product page
1. ($23.02): BG589b2e
paste coupon code in your cart and click Apply 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): BGd26f05, BG00c906, BGdbe184, BGf625a4
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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)).