Model M6 M3K M5
CPU Exynos 7270 14nm Ingenic X1000/E，40nm Ingenic X1000/E，40nm
CPU operating frequency 1GHz 1GHz 1GHz
CPU No. of cores 2 1 1
DAC ES9018Q2C AK4376A AK4377
Bluetooth Chip SAMSUNG S5N5C10B01-6330 N/A CSR8675
Special features WiFi Streaming，LDAC/HWA/aptX/aptX HD/SBC Bluetooth support，Airplay with Apple devices，FiiO Link Long battery life, Deep sleep, Recording, Repeat SBC/AAC/aptX/aptX-HD/LDAC Bluetooth receive, SBC/LDAC Bluetooth transmit, Recording+Bluetooth phone call, Step counter, Gesture operation, Custom screen orientation, Use with watchband
User interface Customized/FiiO Music Linux Linux
WiFi 2.4G，WiFi transmission supported N/A N/A
Bluetooth 4.2 N/A 4.2
Bluetooth transmit LDAC/HWA/aptX/aptX HD/SBC (HWAAvailable when playing on M9, other codecs available when playing on M9 and using as USB DAC) N/A SBC/LDAC
Bluetooth receive SBC/LDAC to be supported N/A SBC/AAC/aptX/aptX-HD/LDAC
DLNA Supported N/A N/A
USB TYPE C Two-way USB2.0  Micro USB2.0 TYPE C Two-way USB2.0
Display size 3.2 inches 2.0 inches 1.54
Display type LG IPS screen IPS TFT IPS TFT
Resolution 480×800 240×320 240×240
Touchscreen 5-finger multi-touch N/A Single-touch
Number of colours 16M 262k 262K
Viewable angle Full-view Full-view Full-view
Pixel density(PPI) 292 200 220.4
RAM 768MB 64MB 64MB
Storage expansion type Micro SD card Micro SD Micro SD
Maximum storage expansion Theoretically 2TB (only one micro SD card slot) Theoretically 2TB (only one micro SD card slot) Theoretically 2TB (only one micro SD card slot)
ROM 4GB  N/A N/A
ROM available to user 2GB N/A N/A
Buttons Physical button+Touch screen Touch button+Physical button Physical button+Touch screen
Headphone out (PO) 3.5mm standard headphone output jack (shared PO/LO) Standard 3.5mm stereo jack decorated with metal ring 3.5mm standard headphone output jack
Line out (LO) 3.5 mm port（shared PO） N/A 3.5 mm port（shared PO）
SPDIF output N/A N/A 3.5 mm port（shared PO）
USB Two-way TYPE C USB2.0（Charging/Data transmisson/USB DAC/USB Audio） Micro USB2.0（Charging/Data transfer/OTG/USB DAC） Two-way TYPE C USB2.0（Charging/Data transmisson/USB DAC/USB Audio）
Color Black Silver, Black Black, Red, Blue, Silver, Titanium
Dimensions 53.3mm×92.5mm×11.5mm 90.8mm×44.2mm×12mm 45.3*42*13.7mm
Weight about 83g about 116 g about 38g
Volume control 120 steps +/- button control 60 steps digital potentiometer 60 steps digital potentiometer
Recommended headphone impedance 16~100 Ω 16~100 Ω 16~100Ω
Equalizer 10-band EQ (±6dB), 9 presets+custom preset 5-band EQ (±6dB)，7 presets 5-band EQ (±6dB)，7 presets
Balance control ±5dB ±5dB ±5dB
USB DAC Up to 192kHz/24bit Up to 192kHz/24bit Up to 384K/32bit；DSD128
USB Audio Up to DSD128 N/A Up to 384K/32bit；DSD128
Battery indication Yes (accurate battery % readings) Yes (Analog battery display) Yes (Analog battery display)
Battery capacity 1200mAh 1100mAh  550mAh
Charging time ＜2.5h（DC5V/2A） ＜2.5 h ＜2.5h
Deep sleep time ＞26 days ＞38 days ＞22 days
Battery life 1 3.5mm headphone output：＞13h 3.5mm headphone output＞24h 3.5mm headphone output＞10.5h
Battery life 2 Bluetooth output：＞15h（SBC） N/A ＞12小时（SBC bluetooth transmit）
Battery life 3 N/A N/A ＞13.5h（SBC bluetooth receive）
Firmware Upgrade Supports both via zip file and OTA Supports both via zip file Supports both via zip file
Recording N/A Supported Supported
 A-B Repeat N/A Supported N/A
OTG Transfer N/A Supported Supported
Clock  Supported Supported Supported
Third-party apps support Preinstalled：FiiO Music, Netease Music, MOOV, Tidal, KKBOX
APP whitelist：Spotify、Qobuz、Roon、Deezer，QQ Music、Xiami Music、JOOX、ES file manager、Himalaya (copy the apk file to Micro SD card or internal storage to install)		  N/A  N/A
Headphone out specifications（3.5mm port） 　 　 　
Output power 1 ≥110mW（16Ω / THD+N＜1%) ≥42mW（16Ω / THD+N＜1%) ≥42mW（16Ω / THD+N＜1%）
Output power 2 ≥70mW（32Ω /THD+N＜1%) ≥25mW（32Ω /THD+N＜1%) ≥24mW（32Ω / THD+N＜1%）
Output power 3 ≥7mW（300Ω / THD+N＜1%) N/A ≥2.7mW（300Ω / THD+N＜1%）
Frequency response 10Hz~85 kHz（-3dB） 5Hz~90 kHz（-3dB） 5Hz~90 kHz（-3dB）
SNR ≥118dB ≥117dB ≥118dB
Output impedance ＜2Ω ＜1Ω（32Ω） ＜0.5Ω
THD+N ＜0.002%（1kHz/32Ω） ＜0.004%（1kHz/32Ω） ＜0.003%（1kHz/32Ω）
Separation ＞75dB N/A 74dB
Noise floor ＜3uV ＜2uV ＜2.5μV
File format support 　 　
Lossless: DSD：DSD64，128（iso”“.dsf”,“.dff”）
APE(Fast): 192 kHz/24 bit
APE(Normal): 192 kHz/24 bit
APE (High): 192kHz/24 bit
APE (Extra High): 48kHz/24 bit
APE (Insane): 48kHz/24 bit
FLAC: 192 kHz/24 bit
WAV: 192 kHz/64 bit
Aiff：192 kHz/24 bit
Aif:192 kHz/24 bit
WMA Lossless: 96 kHz/24 bit
Apple Lossless: 192 kHz/24 bit		 DSD：DSD64（“.iso”“.dsf”,“.dff”）
APE(Fast): 192 kHz/24 bit
APE(Normal): 96 kHz/24 bit
APE (High): 96 kHz/24 bit
FLAC: 192 kHz/24 bit
WAV: 384 kHz/32 bit		 DSD：DSD64，128（“.dsf”,“.dff”）
APE(Fast): 384 kHz/24 bit
APE(Normal): 96 kHz/24 bit
APE (High): 96kHz/24 bit
APE (Extra High): not supported
APE (Insane): not supported
FLAC: 384kHz/24 bit
WAV: 384 kHz/32 bit
Aiff：192 kHz/32bit
Aif:192 kHz/24 bit
WMA Lossless: 96 kHz/24 bit
Apple Lossless: 192 kHz/24 bit
Lossy compression: MP3，OGG，WMA，AAC… MP3，OGG，WMA，AAC… MP3，OGG，WMA，AAC…