Latest update shows that X13 Hidden Camera Detector costs $14.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Listening Device Detector GPS Tracker Detector Bug Sweeper RF Wireless Signal Scanner For Home Office Travel, X13 Hide Camera Detector Bug Detector
Banggood ($14.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Isn’t it too expensive? Let’s see… Average price for this item is $17.03 and current one is $14.99, so it’s a good price!
Link: Banggood product page
Price: $14.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGTOOS729
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for X13 Hidden Camera Detector.
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)).