| Main Unit | |||
| Name / Model No. | M7 | Operating System | Deeply customized Android |
| CPU model | Exynos 7270 14nm | No. of cores | 4 |
| CPU operating frequency | 1.4GHz | DAC | ES9018Q2C |
| Keyboard | Virtual QWERTY keyboard | Input method | Touchscreen |
| Special features | LDAC，FM radio，clock，gestures operation | User interface | Deeply customized /FiiO Music |
| Chips used | SoC: Samsung Exynos 7270 ， DAC：ES9018Q2C, FM chip：Si4705，Bluetooth chip：SAMSUNG S5N5C10B01-6330 | ||
|
Connectivity |
|||
| WiFi | N/A | Bluetooth | Bluetooth V4.2，aptX/aptX-HD supported |
| USB | TYPE C USB2.0 | LDAC | Supported |
|
Display screen |
|||
| Display size | 3.2 inches | Number of colours | 0.26 million colors |
| Display type | TFT | Viewable angle | Full-view |
| Resolution | 480×800 | Pixel density | 292 ppi |
| Touchscreen | Yes | ||
|
Storage |
|||
| RAM | 768MB | Total ROM | 4GB |
| Storage expansion type | Micro SD card | ROM available to user | 2GB |
| Maximum storage expansion | 512GB (only one micro SD card slot) | ||
|
Buttons and ports |
|||
| Buttons | Side buttons + side volume wheel+ touchscreen | Custom key mapping | N/A |
| Headphone out | 3.5mm standard headphone output jack (shared PO/LO) | Balanced output | N/A |
| Line out | 3.5mm standard headphone output jack (shared PO/LO) | USB connection | TYPE C USB2.0（charging / data transfer） |
| Digital Coaxial/Optical out | N/A | ||
|
General |
|||
| Color | Black / Silver / Red / Blue | Dimensions | 52mm×109mm×13mm |
| Weight | About 116 g | Volume control | 60 steps digital potentiometer |
| Recommended headphone impedance | 16~100 Ω | Equalizer | 10-band EQ (±6dB), 9 presets+custom preset |
| Treble boost | N/A | Bass boost | N/A |
| Balance control | ±5 dB | Gain control | N/A |
| USB DAC | N/A | ||
|
Power specifications |
|||
| USB power adapter | DC 5V/2A recommended | Battery | Internal 3.8V 1880mAh Li-polymer battery |
| Charging indication | Red light indicates，blue light turns on after fully charged | Charging time | ＜2.5 h（DC5V/2A） |
| Battery indication | Yes (accurate battery % readings) | ||
| Battery Life & Test Conditions | |||
| 3.5mm headphone output：≥20 h | |||
| Volume | 15 | Load | M3 open earbuds (27 Ω) |
| EQ | OFF | Screen | OFF |
| Test File | MP3 44.1kHz/16bit | ||
| Bluetooth output：＞26 h | |||
| Volume | 60 | Load | 32Ω |
| Test File | MP3 44.1kHz/16bit | Screen | OFF |
| Battery life test file download link | click here to download | ||
|
Others |
|||
| Firmware Upgrade |
Supported via zip file placed in internal storage or micro SD card (*The product uses GPLv2 compliant firmware.) |
Font size | N/A |
| Clock | Supported | Third-party apps support | N/A |
|
FM Index |
|||
| Output power |
>20mW（76MHz） >30mW（108MHz） |
SNR |
>50dBA（76MHz） >70dBA（108MHz） |
| THD+N |
＜0.3%（76MHz） ＜0.1%（108MHz） |
Frequency response | 20Hz~4KHz（-3dB） |
| Covered region | 76－108MHz | ||
|
Line output specifications |
|||
| THD+N | ＜0.004% (1 kHz/10kΩ) | SNR | ≥117dB (A-weighted) |
| Frequency response | 20Hz~90 kHz（-3dB） | Noise floor | ＜3 uV |
| Channel separation | ≥100dB (1 kHz) | Line level | ＞1.2Vrms （10 kΩ/1 kHz） |
| Headphone out specifications (3.5mm headphone out jack) | |||
| Output power 1 | ≥70mW（16Ω / THD+N＜1%) | Output impedance | ＜2 Ω（32Ω loaded） |
| Output power 2 | ≥40mW（32Ω /THD+N＜1%) | THD+N | ＜0.004% |
| Frequency response | 10Hz~90 kHz（-3dB） | Peak output voltage | 3.35 Vp-p |
| SNR | ≥117dB (A-weighted) | Noise floor | ＜3 uV |
| File format support | |||
| Lossless: |
DSD：DSD64（“.dsf”,“.dff”） |
||
| Lossy compression: |
AAC、MP3、WMA、OGG... |
||
Line out - Test condition: 10K ohms loaded, play -5 dB sinusoidal signal, Full volume
Red curve: Left channel , Blue curve: Right channel.
Frequency Response diagram of curves 2.
3.5mm headphone output - Test condition: 32 ohms loaded, play -5 dB sinusoidal signal, Full volume
Red curve: Left channel , Blue curve: Right channel.
Distortion diagram of curves 1.
Line out - Test condition: play -5 dB sinusoidal signal
Distortion diagram of curves 2.
Test condition：play -5 dB sinusoidal signal，headphone output
