Aperture F2.4, Model CMDR001W, Model CMDR001W, No condensation, Resolution 1920*1080, Battery capacity 5200mAh, Wireless connection Wi-Fi IEEE 802.11 b/g/n 2.4GHz RF 433MHz, Working humidity 10%~90%RH, Night vision light 6*940nm infrared night vision lights, System support Android 4.4 or iOS 9.0 and above, Charging Current 5V/2A, Work temperature -10℃ – 50℃, Wireless connection RF 433MHz, Power supply 100~240V，50~60Hz，20mA.
Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
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): BGAFF10OFF, Email5, BgcLuBofErtA10, BGIMIDB1, BGIMID1P, BGIMIDB, BGSTHO15, BGIMI15, BGHONEY2110
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for IMILAB Xiaobai 1080P Video Doorbell Set. The lowest price was: $47.99.
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)).