Weight 0.018 kg, Model Human Body Sensor, Detection Distance 7m, Battery Built-in 1PC CR2450 Button Battery, Wireless Protocol ZiBee Wireless Protocol, Detecton Angle 170°, Light-intensity Detection Support, Working Humidity 0% – 95% RH, Working Tenpereture -10℃ – 45℃, Size (Lx Wx H) 3.00x 3.00x 3.30 cm (1.18x 1.18x 1.3 inches), Brand Aqara (Ecological Chain).
Just check coupons out (with price alert and history). 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 China. I have no active coupons for you right now.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG1a24e5, BGbc16b2, BG88ce5a, ADMITAD2212, BGSmart6, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, BGc96941, BGPLHEJDOM14, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGcoupon8off, BGGutscheine, BG8OFFCOUPON, TTBLACK5, BGXIFD358
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 2x Aqara ZiBee Human Body PIR Sensor [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for 2x Aqara ZiBee Human Body PIR Sensor. The lowest price was: $24.99.
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)).