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K100 (use replaceable battery)

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LCD 5 Inch TFT Touch Screen (720 x 1280)
DAC AKM AK4497EQ x 2 (Dual DAC)
Output Level Unbalanced 4.0 Vrms / Balanced 8.0 Vrms (Condition No Load)
Memory Built-in 128GB (External micro SD up to 1TB)
Signal to Noise Ratio 118dB @ 1KHz, Unbalanced / 120dB @ 1KHz, Balanced
Cross Talk 140dB @ 1KHz,Unbalanced / 140dB @ 1KHz, Balanced
THD+N 0.002% @ 1KHz
MQA K100 includes MQA technology, which enables you to play back MQA audio files and streams, delivering the sound of the original master recording.
More info at http://www.mqa.co.uk

Product Specifications

Product Name K100
Model KA-100
Display 5 Inch TFT Touch Screen (720 x 1280)
CPU & Memory ARM Cortex-A9 1.4GHz,  Quad-Core  Memory(RAM) : DDR3 1GB
Button Power, Play/Pause, FF, REW,  Volume(wheel)
Supported Audio Formats MQA, WAV, FLAC, AAC, ALAC, AIFF, WMA, MP3, OGG
 APE(Normal, High, Fast), Native DSD(DFF,DSF)
EQ & Effect 10Band, NORMAL/USER1/2/3/4/5
Charge & Data Transfer USB Type-C input (for charging & data transfer (PC & MAC))
 Connection Mode : MTP (Media Device)
Outputs Phone (3.5mm) / Optical Out (3.5mm) 
 Balanced Out(2.5mm, 4-pole support)
Battery  4,900mAh/3.6V Li-Ion ( Size: 21700, protect: no ) 
Battery Life(Play) Time & Play: Approximately 8 hours(44.1KHz 16bit, Vol.75, 32ohm, LCD off)
 Charge Time Charge: 4 hours
Memory Built-in 128GB
 External MicroSD (Upto 1TB) ,  Supports SDXC 
Clock Jitter 50ps (Typ)
OS Customized Android
Supported OS Windows 7,8,10 (32/64bit) / MAC OS x 10.9 or higher
Wi-Fi 802.11 b/g/n ( 2.4 GHz )
Bluetooth V 4.0 ( A2DP, AVRCP )
Dimensions 82,5mm(W) * 133.5mm(H) * 16.8(34.5)mm(D)
Weight 295g
    Audio Performance
DAC AKM AK4497EQ x 2 (Dual DAC)
Decoding Support up to 32bit / 384KHz Bit to Bit Decoding
Frequency Response ±0.1dB(Condition: 20Hz~20KHz) Unbalanced
 ±0.06dB(Condition: 20Hz~20KHz) Balanced
 ±0.9dB(Condition: 10Hz~70KHz) Unbalanced
 ±0.7dB(Condition: 10Hz~70KHz) Balanced 
Signal to Noise Ratio 118dB @ 1KHz, Unbalanced 
 120dB @ 1KHz, Balanced
Crosstalk 140dB @ 1KHz,Unbalanced  /  140dB @ 1KHz, Balanced
THD+N 0.002% @ 1KHz
Output Impedance Balanced out 2.5mm(1ohm)  /  Phone 3.5mm(2ohm)
Output Level Unbalanced 4.0 Vrms / Balanced 8.0 Vrms    (Condition No Load)
Volume Step 150 steps