Yes. You can use any external mouse that is compatible with the Windows 11 Home 64-bit Operating System, with this Lenovo Flex 5i 15, model number 82HT00CQUS.

No. This Lenovo Flex 3 11 Chromebook, model number 82KM0003US, ships with 1x USB-C 2.0 (support data transfer, Power Delivery 2.0, and DisplayPort 1.1a) port with video out to an external monitor and supports up to 2 independent displays (native display and 1 external monitor via USB-C). USB-C supports up to 1920x1080@60Hz. You can connect an HDMI monitor to this Lenovo Flex 3 11 Chromebook, by using a USB-c to HDMI adapter, like this one: https://www.bestbuy.com/site/insignia-usb-c-to-hdmi-adapter-black/6473497.p?skuId=6473497

This Lenovo IdeaPad 3 15 laptop, model number 81X800KLUS, ships with an HD (720p) webcam with privacy shutter and Dual Array Microphones built in. Whether this IdeaPad 3 15 is compatible with a specific video conferencing APP will depend on the requirements and compatibility of that specific APP. This IdeaPad 3 15 ships with Windows 11 S-Mode, 64-bit Operating System installed. Windows 11 S-Mode provides added security by only allowing APPs available ( and therefore certified by Microsoft) at the Microsoft Store. If you don't need the added security or you need to install APPs not available at the Microsoft Store, you can switch to standard Windows 11 Home 64-bit Operating System, at no additional cost. We recommend you check with the specific software publisher's web site, of the specific video conferencing APP you want to use, for their compatibility with Windows 11 S-Mode 64-bit operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration. If you need to switch out of S-0Mode for Windows 11 Home: Here is a link to instructions for switching from Windows 11 S-Mode to Windows 11 Home: https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode

This Lenovo IdeaPad 3 15 laptop, model number 81X800KLUS, ships with Windows 11 S-Mode, 64-bit Operating System installed. Windows 11 S-Mode provides added security by only allowing APPs available ( and therefore certified by Microsoft) at the Microsoft Store. If you don't need the added security or you need to install APPs not available at the Microsoft Store, you can switch to standard Windows 11 Home 64-bit Operating System, at no additional cost. We recommend you check with the specific software publisher's web sites, of the specific software APPs you will need to use, for their compatibility with Windows 11 S-Mode 64-bit operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration. If you will need to switch out of S-Mode for Windows 11 Home: Here is a link to instructions for switching from Windows 11 S-Mode to Windows 11 Home: https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode