| 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… |
