Download Marshmallow 6.0.1 stock firmware for MXQ R9 TV Box from here, here or here. Download Lollipop 5.1.1 stock firmware for Unuiga MXQ R9 TV Box from here. Download Rockchip Driver Assistant v4.4 from here and download Rockchip Batch Tool v1.8 from here.
Archive: MXQ R9 RK3229 364748 20170727
Model: Unuiga MXQ R9 TV Box
Image file size: 855 MB
Platform: Rockchip RK3229 / RK322A
Image name: MXQ R9 RK3229 364748 20170727.img
SDK version: RK30_ANDROID6.0.1-SDK-v1.00.00
FW version: 6.0.01
Boot version: 2.32
Model number: MBOX
Build number: rk322x_box-userdebug 6.0.1 MXC89L user.penggw.20170727.143316 release-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.