R-TV BOX K99 is the first RK3399 Hexa Core 64bit TV BOX right now, it has 4GB RAM and 32GB eMMC, supporting 4k at 60FPS, AC WiFi and Gigabit Ethernet all goes along with Bluetooth 4.0, it has started to sell on Geekbuying, you can use coupon code: 4TVBOX to cut down the price for you. Don’t forget to check K99 R-TV Box Android6.0.1 Stock Firmware ROM.
Download Marshmallow 6.0.1 stock firmware for K99 R-TV Box from here, here or here.
Download Rockchip Driver Assistant v4.4 from here, here or here. and download Rockchip Batch Tool v1.8 from here, here or here.
Archive: R-TV BOX K99_RK3399_wifi6255_6.0_20170302
Model: K99 R-TV Box
Image file size: 632 MB
Platform: Rockchip RK3399 / RK330C
Image name: R-TV BOX K99_RK3399_wifi6255_6.0_20170302.img
SDK version: RK30_ANDROID6.0.1-SDK-v1.00.00
FW version: 6.0.01
Boot version: 1.05
Model number: rk3399-box
Build number: rk3399_box-userdebug 6.0.1 MXC89L user.hotack.20170215.110100 test-keys
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.