$12.99 – 2pcs Ultrasonic Pest Repellent 3-in-1 Triple Frequency 360 Degree Coverage Easy Installation Chemical-Free Safe for Pets and Children 800-1800 ft² – 2Pcs Black.
According to my DB the lowest price is $12.99 for 2pcs Ultrasonic Pest Repellent (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($12.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it expensive? Well, this price is higher than average price ($9.32)
Link: Banggood product page
Price: $12.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGc192cb, BG63ac82
(these coupons are old, so probably won’t work)
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 2pcs Ultrasonic Pest Repellent? There we go. The lowest price was: $8.99.
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)).