Firmware Library /library/RockChip PX3 Android 5.1/HXDHCT4_rk3188_5.1(20161216).rar396.81 Mb2020-06-13 19:53HCT4_rk3188_5.1(20170112).zip498.8 Mb2020-06-14 15:04HCT4_rk3188_5.1(20170811).zip485.88 Mb2020-06-14 15:05