The Arlo Pro 4 and Pro 3 is at an end-of-life, and has been discontinued.
It has been replaced with the Pro 4, which carries the same features plus the ability to operate without a base station.
For customers just starting with the Arlo range, we recommend the Pro 4 as it connects directly to your Wi-Fi connection and does not require an external base station (or hub).
The Pro 4 is easier and faster to setup, and has increased mobility by connecting directly to your Wi-Fi network. In some cases, you can also achieve greater connectivity with the Pro 4 as well.