Thanks for the quick answer
The box is a MXQ PRO + which has a S905X 1.5ghz mira-450-GPU 10/100 mb/s ethernet wifi 2.4/5 ghz 2Gb RAm and 16 Gb emmc. 4 USB , 1SD card port HDMI and sound port.
WiFi chip is a strange hs.... unknown
I used this code : Armbian_5.44_S9xxx_Debian_stretch_4.16.1_server_20180515.img.xz
and a DTB file : meson-gxl-s905x-p212.dtb
Gérard