The Lenovo IdeaPad 3 15 Laptop, model number 81X800ENUS, weighs - 1.7 kg (3.75 lbs).

That will depend on the requirements and compatibility of the specific APP you want to run on this Lenovo IdeaPad Duet 5 Chromebook, model number 82QS001HUS. Be sure the APP you want to run is compatible with the Chrome Operating System and can run through an ARM architecture SoC Processor Chip. We recommend you check with the specific APPs software publisher's web site for the APPs requirements and compatibility.

No that functionality is not currently available. You can control the Screen brightness manually with a Voice Command through the Google Assistant, try something like, Hey Google Dim the screen to zero percent. Then when you want the screen visible again, use another Voice Command like, Hey Google, increase screen brightness to 100 percent. You can also use the Auto Brightness feature on the Smart Clock 2. This will automatically adjust screen brightness based on the ambient lighting in the room. To turn on auto brightness, swipe up on the Smart Clock 2 touch screen to reveal settings. Now tap the Sun Icon to open the brightness settings. Tap and hold the Sun Icon again for approximately 2-seconds. You will see an A appear within the Sun Icon. This indicates auto brightness is now turned on. If you have questions about your Smart Clock 2 we recommend you contact Lenovo Tech Support for Smart Devices at: 866-426-0911.

There are a number of reasons why a Chromebook like this Lenovo IdeaPad Duet 5 Chromebook could loose connection to a WiFi signal. Here is a link to some troubleshooting tips for fixing WiFi connectivity within a Chromebook: https://support.google.com/chromebook/answer/6318213?hl=en. If the issue continues, we recommend you contact lenovo Tech Support for Chromebooks at: 800-426-7378.