Large capacity and expandable memory The M30 player is powered by a 1500 mAh battery, fully charge in about 2 hours and provides up to 25 hours of continuous playback. The device has no builtin memory and is expandable up to 256 GB. Durable, stylish design and easy control Built with a CNC aluminum alloy shell for a refined, elegant, and portable look that resists fingerprints. The scroll wheel provides fast, responsive track navigation. The menu and keys feature a onekey lock screen function for simple, reliable operation. resolution display and user experience 2.0inch LCD display with a resolution of 320x240. Intuitive, concise UI for clear software operation at a glance. color saturation display capable of showing lyrics and song titles. HiFi lossless sound and broad format support Professional audio IC plus dual decoding to faithfully reproduce the listening environment. Hard decoding chip uses WM8965 and TI TI's TPA6530 power driver. Supported formats: MP3(848kHz,8320kbps), WMA(848kHz,5384kbps, STD 896kHz), WAV(8192kHz), APE(896kHz, ; 8192kHz, fast), FLAC(8192kHz, LOL10), AAC(848kHz,8320kbps, LC), OGG(848kHz), DSD128(5.6MHz). Use scenarios Daily commute or travel: longlasting battery, large music library without builtin memory limits, easy navigation with the scroll wheel. Gym or outdoor activities: sturdy aluminum body, fingerprintresistant finish, quick access controls for onthefly switching. Home listening and lyrics viewing: contrast display shows lyrics and song titles clearly during playback, with lossless audio for faithful sound reproduction.