Name/Model No. M3 Pro Operation system Linux
CPU Model Ingenic X1000E CPU No. of cores 1
CPU operating frequency 1GHz DAC ES9218P
Special features 1、3.5 inch bezel-less touchscreen
2、Full-touch gesture operation
3、USB Audio
4、USB DAC
5、eBook
6、HD recording
7、Picture preview
8、Built-in calculator		 User interface Customized
Chips used SoC: Ingenic X1000E; DAC: ES9218P
Connectivity
USB TYPE C Two-way USB2.0
Display screen
Display size 3.46 inches Number of colors 262k
Display type TFT Resolution 340*800
Storage
RAM 64MB Storage expansion type Micro SD/TFcard
Maximum storage expansion Single card up to 2TB(theoretically)    
Buttons and ports
Buttons Physical button+touch screen Headphone out(PO) 3.5mm single-ended
USB Two-way Type C USB2.0(charging/data transmisson/USB DAC/USB Audio)    
General
Color Black Dimensions approx. 95.8x45.4x10.4mm
Weight approx. 70g volume control type 60 steps +/- button control
Recommended headphone impedance 16~100Ω Equalizer 7 presets
±5dB Up to 384kHz-32bit/DSD128
USB DAC Up to 384kHz-32bit/DSD128 USB Audio Up to 384kHz-32bit/DSD128
Power parameters
USB power adapter DC 5V/2A recommended Battery capacity 1000mAh
Charging indication Status bar indication、Shutdown charging indication Charging time <2h（DC5V/2A）
Battery indication 5 steps displayed in status bar Deep sleep time 35days
Battery Life & Test Conditions
3.5mm headphone output: ＞15h
Volume 24 Load M3 open earbuds (27 Ω)
Screen OFF Test file MP3 44.1kHz/16bit
Others
Firmware upgrade Supports both via zip file  Clock Supported
Recording Supported eBook Supported
Picture preview Supported Calculator Supported
Headphone out specifications（3.5mm port,）
Output power 1 ≥92mW（16Ω / THD+N＜1%） Output impedance ＜0.3Ω
Output power 2 ≥75mW（32Ω / THD+N＜1%） THD+N ＜0.001%（1kHz/32Ω）
Output power 3 ≥8mW（300Ω / THD+N＜1%） Separation 78dB
Frequency response 20Hz~90 kHz（-3dB） SNR ≥117dB（A-weighted）
Noise floor ＜2μV（A-weighted）    
File format support
Lossless DSD：DSD64，128（“.iso”“.dsf”,“.dff”）
APE(Fast): 384 kHz/24 bit
APE(Normal): 96 kHz/24 bit
APE (High): 96kHz/24 bit
APE (Extra High): nonsupport
APE (Insane): nonsupport
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, etc.

Frequency response curve 1

 

Test condition: Play -5 dB sinusoidal signal, 3.5mm headphone output (32Ω loaded)
Blue curve: Left channel; Red curve: Right channel

Distortion curve 1
Test condition: Play -5 dB sinusoidal signal, 3.5mm headphone output (32Ω loaded)

Distortion curve 2
Test condition: Play -5 dB sinusoidal signal, 3.5mm line output (10kΩ loaded)


Frequency response curve 2

Test condition: Play -5 dB sinusoidal signal, 3.5mm line output (10kΩ loaded)
Blue curve: Left channel; Red curve: Right channel