[MTCB Software Development] Johny DJ:
I unpacked image from - for radio cassette mtcD (rk3188) Android 6.0 (May 16, 2017) Roximo.ru

Here is build prop (looks like it's the same like lollipop one and with tweaks in the end)

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=LMY48Y

ro.build.display.id=rk3188-userdebug 5.1.1 LMY48Y eng.root.20161216.213025 test-keys

ro.build.version.incremental=eng.root.20161216.213025

ro.build.version.sdk=22

ro.build.version.codename=REL

ro.build.version.all_codenames=REL

ro.build.version.release=5.1.1

ro.build.version.security_patch=2015-12-01

ro.build.version.base_os=

ro.build.date=2016年 12月 16日 星期五 21:36:27 CST

ro.build.date.utc=1481895387

ro.build.type=userdebug

ro.build.user=root

ro.build.host=meng_book

ro.build.tags=test-keys

ro.build.flavor=rk3188-userdebug

ro.product.model=rk3188

ro.product.brand=rockchip

ro.product.name=rk3188

ro.product.device=rk3188

ro.product.board=rk30sdk

# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,

# use ro.product.cpu.abilist instead.

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.cpu.abilist=armeabi-v7a,armeabi

ro.product.cpu.abilist32=armeabi-v7a,armeabi

ro.product.cpu.abilist64=

ro.product.manufacturer=rockchip

ro.product.locale.language=ru

ro.product.locale.region=RU

ro.wifi.channels=

ro.board.platform=rk3188

# ro.build.product is obsolete; use ro.product.device

ro.build.product=rk3188

# Do not try to parse description, fingerprint, or thumbprint

ro.build.description=rk3188-userdebug CarDroid 03022017.14:49:40

ro.build.fingerprint=rockchip/rk3188/rk3188:5.1.1/LMY48Y/root12162133:userdebug/test-keys

ro.build.characteristics=tablet

# end build properties

#

# from device/rockchip/rk3188/system.prop

#

#

# system.prop

#

#rild.libpath=/system/lib/libreference-ril.so

#rild.libargs=-d /dev/ttyUSB2

# Default ecclist

ro.ril.ecclist=112,911

ro.opengles.version = 131072

wifi.interface=wlan0

rild.libpath=/system/lib/libril-rk29-dataonly.so

rild.libargs=-d /dev/ttyACM0

persist.tegra.nvmmlite = 1

ro.audio.monitorOrientation=true

#NFC

debug.nfc.fw_download=false

debug.nfc.se=false

#add Rockchip properties here

ro.rk.screenoff_time=2147483647

ro.rk.screenshot_enable=true

ro.rk.def_brightness=200

ro.rk.homepage_base=http://www.google.com/webhp?client={CID}&source=android-home

ro.rk.install_non_market_apps=true

sys.hwc.compose_policy=0

sys.wallpaper.rgb565=0

sf.power.control=2073600

sys.rkadb.root=0

ro.sf.fakerotation=false

ro.sf.hwrotation=0

ro.rk.MassStorage=false

ro.rk.systembar.voiceicon=false

ro.rk.systembar.tabletUI=false

ro.rk.LowBatteryBrightness=false

wifi.interface=wlan0

ro.tether.denied=false

sys.resolution.changed=false

ro.default.size=100

persist.sys.timezone=Europe/Moscow

ro.product.usbfactory=rockchip_usb

wifi.supplicant_scan_interval=15

ro.factory.tool=0

ro.kernel.android.checkjni=0

#set default lcd density to Rockchip tablet

ro.sf.lcd_density=240

ro.adb.secure =0

sys.hwc.enable=0

persist.sys.root_access=0

persist.sys.boot.check=false

sys.graphic.coloradjustable=1

sys.graphic.contrast=100

sys.graphic.saturation=100

sys.graphic.luminance=100

ro.product.manufacturer9=HengChangTong

ro.product.model9=H660000

ro.product.customer=HCT4

ro.product.hostname=Android

ro.product.instruction=PDF

ro.product.gpspkname=null

ro.product.screenclock=false

ro.product.videogesture=false

ro.product.bluetoothname=CarDroid

ro.product.bluetoothpwd=0000

ro.product.weatherhost=yahoo

ro.product.customer.sub=HCT

ro.product.defaultlauncher=null

ro.product.drvingsafe=false

ro.product.drivingvideodisable=false

#

# ADDITIONAL_BUILD_PROPERTIES

#

ro.target.product=tablet

ro.com.android.dateformat=MM-dd-yyyy

ro.config.ringtone=Ring_Synth_04.ogg

ro.config.notification_sound=pixiedust.ogg

ro.carrier=unknown

ro.config.alarm_alert=Alarm_Classic.ogg

ro.rksdk.version=RK30_ANDROID5.1.1-SDK-v1.00.00

dalvik.vm.heapstartsize=8m

dalvik.vm.heapgrowthlimit=80m

dalvik.vm.heapsize=384m

dalvik.vm.heaptargetutilization=0.75

dalvik.vm.heapminfree=512k

dalvik.vm.heapmaxfree=8m

camera2.portability.force_api=1

persist.sys.strictmode.visual=false

dalvik.vm.jniopts=warnonly

ro.rk.bt_enable=true

ro.factory.hasUMS=true

persist.sys.usb.config=mass_storage,adb

testing.mediascanner.skiplist=/mnt/internal_sd/Android/

ro.factory.hasGPS=false

ro.factory.storage_suppntfs=true

ro.factory.without_battery=false

ro.setupwizard.mode=OPTIONAL

ro.com.google.gmsversion=5.0_r2

ro.sf.lcdc_composer=0

debug.hwui.render_dirty_regions=false

keyguard.no_require_sim=true

ro.com.android.dataroaming=true

ril.function.dataonly=1

ro.config.enable.remotecontrol=false

ro.product.version=1.0.0

ro.product.ota.host=www.rockchip.com:2300

persist.sys.dalvik.vm.lib.2=libart.so

dalvik.vm.isa.arm.features=default

dalvik.vm.lockprof.threshold=500

dalvik.vm.dexopt-flags=m=y

net.bt.name=Android

dalvik.vm.stack-trace-file=/data/anr/traces.txt

# Tweaks

#

wifi.supplicant_scan_interval=60

# Increase Performance

debug.performance.tuning=1

video.accelerate.hw=1

# Disable Sending Usage Data

ro.config.nocheckin=1

#Disable Kernel Error Checking

ro.kernel.android.checkjni=0

ro.kernel.checkjni=0

# Faster Boot

ro.config.hw_quickpoweron=true

## Made In RK3xxx Firmware Tools by SergioPoverony from 4pda.ru

# Made In RK3xxx Firmware Tools by SergioPoverony from 4pda.ru

# Made In RK3xxx Firmware Tools by SergioPoverony from 4pda.ru