This is a specialized hardware query. The with board number H3Q44V30 is an Allwinner H3 (or H2+) based Android TV box. Flashing the wrong firmware will brick the device.
: Flashing usually requires a computer , a male-to-male USB cable , and specific software like the Amlogic USB Burning Tool or PhoenixSuite , depending on the chipset. Execution : firmware tv box mxq pro 4k 5g placa h3q44v30
You already own it, need a basic Kodi client or retro emulation (up to PS1), and have time to experiment. MXQ Pro 4K 5G This is a specialized hardware query
(use 4PDA, XDA-Developers, or Chinese forums like ZNDS): Internet Archive (Wayback Machine): Search for "MXQ Pro