The iOPS X5 sturdy design is made out of aluminum with modern pastel colour finishing. It supports A-B super brightness colour full graphic OLED display Plug & Play USB flash drive high-speed USB2.0 MP3/ WMA/OGG music file playback Convenient Navigation System for file searching Infinity folder support. FM receiver & encoding Line - in direct encoding Voice recording Li-Polymer battery 30h playback Convenient 5 direction joystick. Watch & alarm function view JPG images with 4x Zoom view text files World wide multi language support F/W upgradeable 5band EQ SRS WOW sound effect Controlling diverse menu Playback speed control User logo support & Screensaver No Driver needed for windows 2K/ME/XP. Specifications Classification Category Product Specification Audio No. of Channels Stereo (Right Left) Frequency Range 20Hz ~ 20000Hz Headphone Output Right 18mW + Left 18mW (Max. Volume) S/N Ratio 95dB(MP3) FM Tuner Frequency Range 87.5MHz ~ 108.0MHz S/N Ratio 60dB Antenna Headphone Earphone Code Antenna File Support Decoding MPEG 1/2/2.5 Layer3 WMA OGG Vorbis Encoding WMA Bit Rate MP3 : 8Kbps ~ 320Kbps VBR(Variable Bit Rate) WMA : 32Kbps ~ 192Kbps OGG : 64Kbps ~ 500Kbps Tag ID3 V1 Tag ID3 V2 2.0 ID3 V2 3.0 ID3 V3 4.0 General Characteristics Size W35 x H75 x D14mm Weight 48g(Including Battery) Image File JPEG Data - x5 Zoom Playback (Music) Max. 25 Hours (128Kbps 44.1KHz MP3 EQ Normal Vol 20 LCD off) Playback (FM Tuner) Max 30 Hours (Vol 20) Language Multi Language (40 Different Countries) Memory 256MB/512MB/1GB Built-in Memory USB USB 2.0 (High speed) MAX 80Mbps Charging 2~3 hours by PC USB or exclusive adaptor Battery Li-Polymer rechargeable battery LCD Color Organic EL Display (4096) Voice Recording 1GB : 144 hrs. (WMA 32kbps)