RF433NHz, Lens Angle 139°, Connection Protocol WIFI IEEE 802.11b/g/n 2.4GHz, Storage Function Cloud Storage, Compression H.265, Rated Input 4.5V/0.2A, Video Frame Rate 20FPS, Operating Humidity 10%-90%RH, Storage Temperature <30℃, Operating Temperature 0℃-45℃, Battery Type AA LR6 1.5V, Intercom Function Support, Resolution 1920x1080, Night Vision Light 4x 850nm IR LEDs, Model MJML02-FJ, non-condensing, Support System Android4.3 Or iOS9.0 and Above. Basically copy coupon, view price history or create e-mail price alert. What is 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 Europe 
. I don’t know if this is a good price – number of records in my database is too low! We have found one coupon for this product!
Link: Banggood product page
1. ($45.11): 00c906
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGSAMH, bGhOnEy10, elec, BG2DBELL, BGAFF10OFF, BGdragonBoat, BGMi30, BGPPLCAMP, bgshOOp10, BgoFErTaSchInA10, BGELIG0920, BGHALLOWEEN, BGRMJBELL, SKUE68087, BGHU0134, BgcLuBofErtA10, BGXIAOBIDB2, BGCuponation10, 13f142, BGHONEY2110, BGHU0739, BG8a5932, BGaf5de1, 6GSGIT, BG4a7a54, BG5fa7b7, BANGGOODSD, BGfaa00b, BG335e99, BG06e933
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi MJML02-FJ 1080P Smart Video Doorbell ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $41.99.
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)).