Lamp: ALPD, Max. Extended Capacity: 64GB, SPDIF, Digital, Home Theater, Bluetooth: Bluetooth 4.1, Entertainment, Headphone/Microphone Jack-, Native Resolution: 3840x 2160, PORTABLE, iPhones, Image Scale: AUTO, 3.5mm Audio, Features: Wireless, Audio Input, Laser, Operating System: Android, Projection Distance: 14-50cm, Image Size: 80-150 inches, Laptop, Earphone, Power Supply: 200-240V / 50 – 60Hz, Main Materials: ABS, Application Scope: Home, Contrast Ratio: 3000: 1 – 4000: 1, Type: Short-Focus, WIFI: 802.11 a/b/g/n/ac, PC, Lamp Power: 330W, Package Weights: 9.2KG, USB, Aspect Ratio: 16: 9 / 4: 3, Display Type: DMD, Model Number: C700, Compatible with: Mobile phones, Package Sizes: 56.8×47.5×18.3cm, Resolution: Support 4K, Tablet PC, HDMI, Interfaces: USB3.0, Throw Ration: 0.233: 1, Noise (dB): 38dB.
Just check coupons out (with price alert and history). You probably want to know what is the 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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($3890.06): 7bcdf9
2. ($3892.06): Email5
3. ($3892.06): BGAFF7OFF
put item in your cart and apply coupon code there 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): BGCL700, aff7off, BGBFAFF2019, BGOPcoupon101, BGCITYADS2019, bGpAnDacHeCk, 2880c7, BGMPB2020, bGhOnEy10, BGdragonBoat, bgshOOp10, BgoFErTaSchInA10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Wemax C700 4K Laser Projector? There we go. The lowest price was: $2799.99.
Price records source(s): Gearbest, 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)).