This is the new gen water detection sensor from Samsung. Priced at $19.99. I was able to save $1.50 using Unidays. Final price was $18.49.
If you have unused Samsung Pay Points - you can use ONE coupon per order (I learned the hard way). For me, it was $9.13 shipped after Unidays and $10 Samsung Pay Coupon (Unidays and Samsung Pay coupon are YMMV). $19.99 is still a decent price for the latest water sensor in my opinion.
Unidays link for $1.50 off: https://www.myunidays.com/US/en-U...ess/online
($18.49 @ Samsung w/UniDays)
Amazon also has these for $19.99: https://www.amazon.com/dp/B07F951...c8805f0INT
Bestbuy also has these for $19.99: https://www.bestbuy.com/site/sams...=212&loc=1