[ROM] R-TV BOX X99 stock firmware Android 7.1.2

Hi at all

R-TV BOX X99 RK3399 4G/32G Android 7.1.2 stock firmware for Download

t9_rk3399_d32_ap6255_20180323_r1（R-TV BOX X99）

Download:
https://mega.nz/#!58t1kZTD!nNZ5XPXHo...hIu2m2y5VwZoC4

Does anyone know how to root X99 ? Thanks in advance