High Resolution Lossless Music MP3 Player
The firmware upgrade file download address is below:
please download and upgrade it. upgrade process is below: 1,download the “RKNANOFW” file from the link, 2,transfer the music file to your computer from the player(if there is no music file in the player,skip this step) 3,transfer the firmware upgrade file to the root directory of the player from the computer 4,turn of the player and turn on it 5,the player will upgrade automatically. 
Description:
HIFI Lossless Music player, High sound quality, extraordinary music experience
Screen Size: 2.4 inches TFT screen
Screen Resolution: 320 x 240
Material: CNC
Front and rear panel: Glass
Button operation, change songs optionally
Audio Format: MP3 / WMA / WAV / APE / FLAC / ACC / OGG / ALAC/ DSD 256
Tips:
The package will dont include the right headphone amplifier,only left SM5-II music player
MUSIC FORMAT SUPPORT:
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APE、FLAC、ALAC、WAV、WMA、OGG、MP3、DSD256
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WAV:
PCM(8bit,16bit,24bit,32bit),MS-ADPCM(4bit),IMA-ADPCM(3bit,4bit)~192KHZ
APE:
C1000(Fast),C2000(Normal),C3000(High),C4000(ExtraHigh),C5000(Insane)(16bit,24bit)~96KHZ,max 9.6Mbps
FLAC:(Level0,Level1,Level2,Level3,Level4,Level5,Level5,Level6,Level7,Level8)(16bit,24bit) ~192KHZ,max 9.6Mbps
SUPPORT CUE
ALAC:
(16bit,24bit)~192KHZ,max 9.6Mbps（.m4a）
OGG:Q1–Q10
MP3:
CBR VBR 8KBPS–320KBPS~48KHZ
WMA:
CBR VBR 5KBPS–320KBPS ~48KHZ
DSD：
DSD64、DSD128、DSD256 （.dsf .dff）
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Capacity: 8G
DAC:AK4495SEQ
Bluetooth:4.0
Amplifer IC: 2 Pcs SaoMai Cusom Edition Amplifier IC
External Expansion Card: TF card
The Maximum Capacity: 128G
Frequency: 17 Hz – 20 kHz
Distortion rate: less then 0.04 % (1KHz)
SNR: more then 102 dB
Separation: Headphone: more then 68DB (1KHz)
The maximum output level: 700mV
Postive and Negative Voltage: 5V
Volume control:100 Steps
Built in battery:2000 mAh
Maximum energy consumption: 400mW
Output Power: Headphone: 32 mW x 2
Battery Type: lithium-ion battery
Charger Specifications: 3.7V
Earphone output: 3.5mm Impedance: 16 – 300 Ohm
Standby Time: 50 hours
Playing Time: 15 hours
Package weight: 0.114 kg
Product Size(L x W x H): 10.00 x 6.00 x 1.50 cm / 3.94 x 2.36 x 0.59 inches
Package Size(L x W x H): 14.00 x 8.00 x 3.60 cm / 5.50 x 3.15 x 1.42 inches
Below is sample show,the package only include SM5 music player,dont include headphone and headphone amplifier
