Hi, I got the same box. I ordered it thinking it was Tanix TX3 Mini with S905W Chip but upon countless tries with all of the s905w dtb, the one with the s905l2 succeeded booting.
Also, further looking into the box, I found a dtb files inside the /dev folder on the android. I tried running binwalk on it and it shows it as a fdt file. I tried fdtdump -s and got some readable output. Maybe this will help others to figure out more about this box.
s905l2.dtb