You can use this hub to charge your device and connect peripherals simultaneously. It supports pass-through charging up to 100W PD, with 85W PD to the host device. However, it does not specifically support connecting a screen for display extension. It is designed for connecting USB-C peripherals like cameras, keyboards, and external SSDs. If you need to connect a screen, you should check if your device supports display output through USB-C and if the hub can handle such a connection, but generally, it is not intended for display extension.
Yes, the Belkin USB-C to 4-Port USB-C Hub (AVC018BTBK) does consume power to operate. The hub supports pass-through charging up to 100W, but it uses 15W of this power for its own operation, leaving 85W available for the host device.