Power and endurance Builtin rechargeable lithium battery Up to 20 hours of continuous playback on a full charge Design and build Classic design with a simple, exquisite, and fashionable appearance Portable and easy to carry Language options and power saving Language support: Spanish, Portuguese, and English (default) Auto shutdown timer to save power USB drive (U disk) support for convenient music storage and playback Music playback and lyrics Supports MP3 and WMA digital music formats Lyrics display for singalong or lyric reference Practical use scenarios Daily commute or travel: long battery life lets you enjoy music without frequent recharging Language learning or multilingual environments: switch among English, Spanish, and Portuguese to suit your needs USB drive playback: load a collection on a USB drive and play directly with lyrics display for easy listening without keeping a computer on Notes All functions and specifications align with the original product features: builtin power, classic design, multilanguage support, auto shutdown for energy efficiency, USB drive compatibility, MP3 and WMA playback, and lyrics display.