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Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Speaker: 3W 4Ohm HIFI Speaker, 3D Function: Support red-blue 3D, Light source: 50000 Hours long life, Native Resolution: 1920x1080P, Multiscreen Version support Wired sync display with IOS Devices, Voltage: AC100-240V/50-60Hz, None Android, Multiscreen Version support Wireless Technology support 2.4G /5G WIFI Display / wireless sync display with Android/IOS Devices, Keystone: +/- 15 Degree, , from HDMI-compatible signal support 2K 4K, REMOVEABLE DUST FILTER / Easily take out the dust filter / simply clean the dust, Zoom: 75-100% Digital Zoom, Brightness: 6000 Lumens, Lamp Type: LED Lamp / 50000 Hrs
Banggood
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment.
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGTDP99, BGLaurent, BGAProjector, BGCJTD639, BGProj, BGTD639, BGJSTDA93, BGTHDA93, BG6bb02d, BGTKJ639, BG589b2e, BG10f9a4, BGProjcc, BGb61c32, BGf72676
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Thundeal TD93Pro 1080P Projector.
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)).