| Name/Model | M33 R2R |
| Hardware solution | SoC: Qualcomm Snapdragon 680, DAC: FIIO proprietary R2R DAC, USB DAC: XU316; |
| Working modes | Android/Pure Music/AirPlay/USB DAC/Bluetooth reception |
| Colors | Retro gold/dark blue/black |
| Weight | About 258g |
| Dimensions | About 138.2x71.5x17mm |
| Volume control | Button control |
| Display | 5.5-Inch (1080x2160) fully laminated screen |
| Internal storage/Usable storage (ROM) | 128GB/About 112GB |
| Channel balance | L20~R20 (0.5dB per level) |
| Gain selection | Over-ear headphone mode (Connect a fast charger)/High/Medium/Low |
| Buttons | Power button*1, Volume button*2, Multifunction button*1, Play/Pause button*1, Previous track*1, Next track*1 |
| USB | Type-C USB3.0*1 (Charging/Data transfer)+Type-C POWER IN*1 (Charging/Independent power supply interface) |
| Slide switch | D.MODE button*1 |
| Headphone output | Standard 3.5mm port |
| Line output | Standard 3.5mm port (shared PO) |
| Coaxial output | Standard 3.5mm port (shared PO) |
| Balanced headphone output | Standard 4.4mm port |
| Balanced line output | Standard 4.4mm port (shared BAL) |
| WiFi | 2.4GHz/5GHz, DLNA/AirPlay/WiFi music transfer |
| Bluetooth transmission (5.0) | SBC/aptX/aptX HD/LDAC/LHDC |
| Bluetooth reception (5.0) | SBC/LDAC |
| Remote control | Supports WiFi control |
| MQA | Supports global decoding |
| ALL TO DSD | Yes |
| PEQ | Supports 10-band PEQ and AUTO EQ |
| Sound profiles | Natural sound/Warmer sound |
| Firmware update | Supports local storage upgrade+microSD card local upgrade+OTA push upgrade |
| Power supply | PD2.0/PD3.0 PPS fast charging |
| Charging time | About 1.5h (PD3.0 PPS fast charging) |
