DESC: Product Features: Interface: USB 2.0; Storage Capacity: 1 GB; Screen Size: 1 inch; Main Storage Type: Built-in Memory; Number of Songs: 250; Usage: Music, Recording; Audio Format: ASF, MP3, MP3 VBR, Ogg Vorbis, WAV, WMA; Frequency Respone: 20 Hz - 20,000 Hz; MP3 Bit-Rate: 32 kbps - 320 kbps; Signal to Noise Ratio: 90 dB; WMA Bit-Rate: 32 kbps - 320 kbps; On Screen Display: ID3 Tag Info, Play Mode, Playlist / Table of Contents, USB Connection; No. of Lines: 4 Lines; Outputs: Headphone Jack; Additional Features: Equalizer Controls, FM Stereo Tuner, File Browsing, Voice Recorder; Battery Life: Up to 25 Hours; Battery Type: Rechargeable Lithium Battery; Power Source: Internal Battery, Rechargeable via USB cable; Depth: 0.71 in.; Height: 1.26 in.; Width: 3.07 in.; Weight: 1.55 oz.; Weight and Size: Compact; Family Line: TrekStor i.Beat