I am monitoring price for Window Security Burglar and it is for 12.64 USD now (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood (12.64 USD)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Low/high price? Well, this price is higher than average price (4.04 USD)
Link: Banggood product page
Price: 12.64 USD
Old coupons (from the oldest to the newest): BGalarm20, AFfbG10, affbg10, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGHOMEG12, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, BGHome15%, BgcLuBofErtA10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BGISOC646, BANGGOODSD, 6GSGIT, BGBF20off2, 00c906, BG00c906, BGAlerabat1, Terence, Tabby20, 2203ActiesNL, BG1efeb0, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, TTSUMMER8, Cuponation9, BGdbe184, BG589b2e, BGf625a4, BGc4a05f
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
More on Aliexpress… Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Smart Door Window Security Burglar Alarm.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).