That Lenovo tablet with HDMI input is official, and it's a monster media machine
Lenovo's Android Tablet Story: Netflix, Storage and a Pen | TIME.com
Wholesale Tablets With Hdmi Output Products at Factory Prices from Manufacturers in China, India, Korea, etc. | Global Sources
Top Tablets with HDMI Output and Input
Plugable 8-in-1 USB C Docking Station for iPad with Stand, 100W Pass-through Charging USB-C Hub, 1x HDMI, 2x USB, Audio, and SD, Compatible with Windows, iPadOS, USB-C Phones, and Tablets - Walmart.com
That Lenovo tablet with HDMI input is official, and it's a monster media machine
Review of Idolian Mini Studio 8” Android Tablet | Technogog
Top Tablets with HDMI Output and Input
Voxx Vxmtg1313.3" Hd Led Overhead Video Monitor With Built-in Dvd Player And Hdmi Input : Target
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Top tablets with HDMI connections - CNET
Amazon.com: NAVISKAUTO 17.9" Portable DVD Player with 15.6'' Large Screen Free Carry Bag Rechargeable Battery Support HDMI Input, 1080P Video, MP4, Sync Screen, Last Memory, AV in & Out, Region Free, USB :
Amazon.com: Pixio PX160 Portable Monitor 15.6 inch IPS HDR FHD 1920 x 1080 60Hz with Screen Cover Stand USB Type-C Display HDMI for Laptop, PC, Console and Phone : Electronics