For your information from getprop, it show android version 5.1.1 api 22
Code:
/system/bin/sh: get: not found
127|root@eanab:/ # getprop
[alsa.mixer.capture.headset]: [Capture]
[alsa.mixer.capture.master]: [Capture]
[alsa.mixer.playback.headset]: [Headphone]
[alsa.mixer.playback.master]: [Playback]
[alsa.mixer.playback.speaker]: [Playback]
[back_camera_name]: [csi]
[back_camera_orient]: [0]
[camera.disable_zsl_mode]: [1]
[com.amazon.async_cpu_count]: [1]
[config.disable_bluetooth]: [true]
[config.disable_location]: [true]
[config.disable_telephony]: [true]
[dalvik.vm.dex2oat-Xms]: [64m]
[dalvik.vm.dex2oat-Xmx]: [512m]
[dalvik.vm.dexopt-flags]: [m=y]
[dalvik.vm.heapgrowthlimit]: [80m]
[dalvik.vm.heapmaxfree]: [8m]
[dalvik.vm.heapminfree]: [512k]
[dalvik.vm.heapsize]: [384m]
[dalvik.vm.heapstartsize]: [8m]
[dalvik.vm.heaptargetutilization]: [0.75]
[dalvik.vm.image-dex2oat-Xms]: [64m]
[dalvik.vm.image-dex2oat-Xmx]: [64m]
[dalvik.vm.isa.arm.features]: [default]
[dalvik.vm.skpheapgrowthlimit]: [20m]
[dalvik.vm.skpheapmaxfree]: [512k]
[dalvik.vm.skpheapminfree]: [128k]
[dalvik.vm.skpheapstartsize]: [2m]
[dalvik.vm.skpheaptargetutil]: [0.95]
[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]
[debug.choreographer.vsync]: [0]
[debug.egl.hw]: [0]
[debug.force_rtl]: [0]
[debug.service.log]: [1]
[debug.sf.enable_hgl]: [1]
[debug.sf.nobootanimation]: [0]
[debug.sf.showfps]: [0]
[dev.bootcomplete]: [1]
[dev.fireos.bootstatus]: [0]
[dhcp.wlan0.dns1]: [8.8.8.8]
[dhcp.wlan0.dns2]: [8.8.4.4]
[dhcp.wlan0.dns3]: []
[dhcp.wlan0.dns4]: []
[dhcp.wlan0.domain]: [itotolink.net]
[dhcp.wlan0.gateway]: [192.168.0.1]
[dhcp.wlan0.ipaddress]: [192.168.0.12]
[dhcp.wlan0.leasetime]: [28800]
[dhcp.wlan0.mask]: [255.255.255.0]
[dhcp.wlan0.mtu]: []
[dhcp.wlan0.pid]: [796]
[dhcp.wlan0.reason]: [REBOOT]
[dhcp.wlan0.result]: [ok]
[dhcp.wlan0.server]: [192.168.0.1]
[dhcp.wlan0.vendorInfo]: []
[fos.config.app_start_preview]: [false]
[front_camera_name]: [uvc]
[front_camera_orient]: [0]
[gsm.ril.delay]: [15]
[hwc.enable_dither]: [1]
[hwc.stretch.filter]: [1]
[init.svc.adbd]: [stopped]
[init.svc.bootanim]: [stopped]
[init.svc.console]: [running]
[init.svc.debuggerd]: [running]
[init.svc.devicetype]: [stopped]
[init.svc.dhcpcd_wlan0]: [running]
[init.svc.drm]: [running]
[init.svc.enable_kdebugs]: [stopped]
[init.svc.epdcinit]: [stopped]
[init.svc.factoryadb]: [stopped]
[init.svc.flash_recovery]: [stopped]
[init.svc.fosflags]: [stopped]
[init.svc.get_klogs]: [stopped]
[init.svc.healthd]: [running]
[init.svc.installd]: [running]
[init.svc.keystore]: [running]
[init.svc.lmkd]: [running]
[init.svc.logd]: [running]
[init.svc.media]: [running]
[init.svc.netd]: [running]
[init.svc.post-recovery]: [stopped]
[init.svc.sdcard]: [running]
[init.svc.servicemanager]: [running]
[init.svc.settime]: [stopped]
[init.svc.surfaceflinger]: [running]
[init.svc.ueventd]: [running]
[init.svc.vitals_service]: [running]
[init.svc.vold]: [running]
[init.svc.vp_metrics]: [stopped]
[init.svc.wifi_mac]: [stopped]
[init.svc.wpa_supplicant]: [running]
[init.svc.zygote]: [running]
[media.omxgm.enable-player]: [1]
[media.omxgm.enable-record]: [0]
[media.omxgm.enable-scan]: [1]
[net.bt.name]: [Android]
[net.change]: [net.dns2]
[net.dns1]: [8.8.8.8]
[net.dns2]: [8.8.4.4]
[net.hostname]: [amazon-b30d58f13]
[net.qtaguid_enabled]: [0]
[net.tcp.default_init_rwnd]: [60]
[persist.ande.display.log]: [0]
[persist.bootanim.unifiedboot]: [1]
[persist.last.build.number]: [660655220]
[persist.service.dropbox.seq]: [84]
[persist.sys.country]: [US]
[persist.sys.dalvik.vm.lib.2]: [libart.so]
[persist.sys.language]: [en]
[persist.sys.last_synced_time]: [1611938570251]
[persist.sys.last_verified_build]: [Amazon/eanab/eanab:5.1.1/2.1.0-ga-rc3/.6.6.0_user_660655220:user/release-keys]
[persist.sys.localevar]: []
[persist.sys.metrics.last_app]: [not supported by device]
[persist.sys.mtp_defer]: [no]
[persist.sys.ota.silent]: [false]
[persist.sys.ota.verified]: [success]
[persist.sys.otaAtPowerDown]: [0]
[persist.sys.profiler_ms]: [0]
[persist.sys.recovery.batt_level]: [25]
[persist.sys.timezone]: [Asia/Ho_Chi_Minh]
[persist.sys.ui.hw]: [0]
[persist.sys.usb.config]: [mtp]
[persist.sys.wifi.country_code]: [VN]
[persist.vpartition.metrics]: [ok]
[persist.wifi.rssi.thresholds]: [-100,-90,-75,-69]
[ro.FSL_AAC_PARSER]: [1]
[ro.FSL_ASF_PARSER]: [0]
[ro.FSL_AVI_PARSER]: [1]
[ro.FSL_FLAC_PARSER]: [1]
[ro.FSL_FLV_PARSER]: [1]
[ro.FSL_MKV_PARSER]: [1]
[ro.FSL_MPG2_PARSER]: [1]
[ro.FSL_REAL_PARSER]: [0]
[ro.adb.secure]: [1]
[ro.allow.mock.location]: [0]
[ro.amazon.fosflags]: [1]
[ro.baseband]: [unknown]
[ro.board.platform]: [imx6]
[ro.boot.console]: [ttymxc0]
[ro.boot.hardware]: [freescale]
[ro.boot.prod]: [1]
[ro.boot.selinux]: [enforcing]
[ro.boot.serialno]: [G000xxxxxxxxxxxx]
[ro.boot.unlocked_kernel]: [false]
[ro.bootloader]: [unknown]
[ro.bootmode]: [unknown]
[ro.build.characteristics]: [tablet]
[ro.build.configuration]: [e3os]
[ro.build.date.utc]: [1601498243]
[ro.build.date]: [Wed Sep 30 20:37:23 UTC 2020]
[ro.build.description]: [eanab-user 5.1.1 2.1.0-ga-rc3 .6.6.0_user_660655220 release-keys]
[ro.build.display.id]: [2.1.0-ga-rc3]
[ro.build.fingerprint]: [Amazon/eanab/eanab:5.1.1/2.1.0-ga-rc3/.6.6.0_user_660655220:user/release-keys]
[ro.build.flavor]: [eanab-user]
[ro.build.host]: [i3-ri-14-use1a-b-51]
[ro.build.id]: [2.1.0-ga-rc3]
[ro.build.lab126.build]: [6552]
[ro.build.lab126.buildtype]: [Nightly]
[ro.build.lab126.project]: [eanab_ship_5728]
[ro.build.lab126.sign.type]: [release]
[ro.build.mktg.fireos]: [Fire OS 5.7.2.8 (660655220)]
[ro.build.platform.version]: []
[ro.build.product]: [eanab]
[ro.build.tags]: [release-keys]
[ro.build.type]: [user]
[ro.build.user]: [build]
[ro.build.version.all_codenames]: [REL]
[ro.build.version.base_os]: []
[ro.build.version.codename]: [REL]
[ro.build.version.fireos.sdk]: [4]
[ro.build.version.fireos]: [5.7.2.8]
[ro.build.version.incremental]: [.6.6.0_user_660655220]
[ro.build.version.name]: [Fire OS 5.7.2.8 (660655220)]
[ro.build.version.number]: [660655220]
[ro.build.version.release]: [5.1.1]
[ro.build.version.sdk]: [22]
[ro.build.version.security_patch]: [2019-07-01]
[ro.carrier]: [unknown]
[ro.config.low_ram]: [true]
[ro.config.no_gpu]: [true]
[ro.crypto.state]: [unencrypted]
[ro.dalvik.vm.native.bridge]: [0]
[ro.debuggable]: [0]
[ro.e3os.cnfonts]: [STBShusong,STHeiti,STZhongyuan,STKaiti]
[ro.factorytest]: [0]
[ro.fireos.target.extension]: [default]
[ro.fireos.target.product]: [eanab]
[ro.hardware]: [freescale]
[ro.keyguard.draw.delay]: [0]
[ro.keyguard.draw.timeout]: [1000]
[ro.logd.size.metrics]: [128000]
[ro.logd.size.vitals]: [128000]
[ro.logd.size]: [64K]
[ro.powermon.update_interval]: [300]
[ro.product.board]: [EANAB]
[ro.product.brand]: [Amazon]
[ro.product.config.type]: [A24H326H7TXQ18]
[ro.product.cpu.abi2]: [armeabi]
[ro.product.cpu.abi]: [armeabi-v7a]
[ro.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.product.cpu.abilist64]: []
[ro.product.cpu.abilist]: [armeabi-v7a,armeabi]
[ro.product.device]: [eanab]
[ro.product.locale.language]: [zh]
[ro.product.locale.region]: [CN]
[ro.product.manufacturer]: [Amazon]
[ro.product.model]: [KFBJWI]
[ro.product.name]: [eanab]
[ro.product.package_name]: [com.amazon.eanab.android.os]
[ro.recovery.wl.maxstore]: [256000]
[ro.revision]: [0]
[ro.ril.wake_lock_timeout]: [300]
[ro.runtime.firstboot]: [1611938601748]
[ro.secure]: [1]
[ro.serialno]: [G000xxxxxxxxxxxx]
[ro.sf.lcd_density]: [160]
[ro.sys.cached_apps_limit]: [8]
[ro.tether.denied]: [false]
[ro.wifi.channels]: []
[ro.zygote.disable_gl_preload]: [true]
[rw.VIDEO_RENDER_NAME]: [video_render.surface]
[selinux.reload_policy]: [1]
[service.bootanim.exit]: [1]
[sys.audio_init]: [true]
[sys.boot_completed]: [1]
[sys.captive_portal]: [0]
[sys.emulated.battery]: [1]
[sys.exit.bootanimation]: [1]
[sys.lab126.hasDeviceTime]: [true]
[sys.max_sync_alarm_timeout]: [86400000]
[sys.settings_global_version]: [1]
[sys.str.enabled]: [true]
[sys.sysctl.extra_free_kbytes]: [5625]
[sys.sysctl.tcp_def_init_rwnd]: [60]
[sys.usb.config]: [mtp]
[sys.usb.state]: [mtp]
[sys.viewroot.hw]: [false]
[vitals.restart_count]: [2]
[vitals.restart_time]: [1611938544]
[vold.pfe]: [deactivated]
[vold.post_fs_data_done]: [1]
[wifi.ap.interface]: [wlan0]
[wifi.interface]: [wlan0]
[wlan.driver.status]: [ok]