CNC aluminum alloy shell with fingerprintresistant finish Fashionable craftsmanship that is elegant, portable, and durable. The aluminum alloy shell is precision machined for a feel. Responsive scroll wheel navigation and onekey lock The scroll wheel provides quick, responsive track search. Menu and back keys include a onekey lock screen function for easy operation on the go. Power, memory, and expandability 1500 mAh battery: full charge in about 2 hours and up to 25 hours of continuous playback. No builtin memory: supports expandable storage up to 256GB. (Expansion via external memory card) resolution display and intuitive UI 2.0inch LCD display with 320x240 resolution. Clear, concise user interface with color saturation. Supports displaying lyrics and song titles. HiFi lossless sound with reliable decoding Lossless playback with professional audio IC and dual decoding. Decoding hardware includes WM8965 and TI TPA6530 power amplifier. Supported audio formats MP3 (848kHz, 8320kbps) WMA (848kHz, 5384kbps, STD 896kHz) WAV (8192kHz) APE (896kHz, ; 8192kHz, fast) FLAC (8192kHz, LOL10) ACC (848kHz, 8320kbps, LC) OGG (848kHz) DSD 128 (5.6MHz) Use scenarios Daily commute: compact, durable build and responsive controls make it easy to navigate and control playback on the move. Gym or outdoor activities: long playback time and lightweight design pair with the fingerprintresistant finish for rugged daily use. Travel or study: quality audio and clear display for recognizing lyrics and track information during long sessions. Model: M30 Combines build, longlasting power, expandable storage, clear display, and fidelity sound in a compact, userfriendly package.