You can check this firmware is for KII Pro TV Box with Amlogic S905 CPU. Right now it is in flash sale from from Gearbest for only $69.99 with free shipping world wide.
Download latest Android Lollipop 5.1.1 stock firmware for KII Pro TV Box from here or here . Download
Download Amlogic USB Burning Tool v2.0.8 from here, here or here or download Amlogic Burn_Card_Maker v2.0.2 from here, here or here.
Firmware details
Archive： KII_PRO TDT SAT_S905_IMG28022017
Image file name: KII_PRO_DTV-LMY47V-20170228.094919.V1031P3.img
Firmware: Android Lollipop 5.1.1 stock
Image file size: 447 MB
Platform: Amlogic S905
Caution: Please update your tv box with much experience, if your tv box faces the problem like bricking, you can have a try with much experience. The firmware update process is done entirely at your own risk. Before updating, don’t forget to back up your data first.