At the other two stores, the product did not even arrive and was processed for a refund. This store shipped quickly and arrived early. The wifi800 is supposed to have better image quality than the wifi900, but the wifi900 took better pictures in the dark. The image quality was rough and the ISO was set to 400 so I set it to 200 on the wifi830 and will test it tonight. The wifi830 has a stronger structure to seal the product. It is convenient to be able to connect the wifi830 to a PC via USB and treat it as a storage device, but the wifi900 needs a small USB male terminal because of interference around the USB port. The wifi can be downloaded from the webUI by accessing the IP address of the gateway without using the app. Communication over wifi is slow. It is faster to use wifi to check if data is available and then use USB connection to download data. I wanted to combine the shooting part of the wifi900 with the non-shotting part of the wifi830.
the camera doesn't work. i spent one full month trying to comunicate with the seller without success. i do not recommand to buy from them (i will get in touche with aliexpress.com for a refund...)
horrible experience with seller. camera doesn't work. i throwed my money to garbage