Language: Multilingual, Battery: Built-in lithium battery (display only), Night vision: Infrared night vision about 3 meters, Transmission method: wireless point-to-point transmission (short-range transmission), Detection method: Voice-activated power-saving mode, Intercom way: two-way intercom, Resolution: 640*480P, Transmission distance: line of sight about 150 meters, Product model: SM650, Function: electric universal head, Monitoring: Indoor temperature display, Music: built-in polyphonic music for about 3 minutes, Screen size: 5.0 inch high-definition LCD display.
Just check coupons out (with price alert and history). Let’s see what best price is ATM.
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 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): BGsaleSaS, BGSaleFeb8, BGSaleAD, BGMARCHSALE, BGe09f7e, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8, BG8FORMULAMX
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for 5inch Video Baby Monitor with Camera. The lowest price was: $28.99.
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)).