[. . . ] [. . . ] ** MPEG4 sp, WMV9 sp (15-30ftp) X General SERIES X20. Detailed Specification iriver X Series X20 X20 2GB, 4GB, 8GB* 22 hours(MP3, 128kbps, 44. 1kHz, EQ Normal, Vol 20, LCD Off) 6hours(avi, 320x240@30fps, video : 512kbps, Audio : MP3, 128kbps, 44. 1kHz) USB 2. 0 Normal, Rock, Jazz, Classic, Pops, CustomEQ(5 band) Approx. 71g -5 ~ 40 Line In & Direct Encoding 2. 2inch QVGA TFT LCD (320x240) DC 5V/1A (optional) Built-in Lithium ion Rechargeable Battery 20Hz~20kHz 13mW + 13mW 90dB Stereo (L+R) KR, US, EU : 87. 5MHz ~ 108MHz, JP : 76MHz ~ 108MHz 60dB Headphone / Earphone-Cord Antenna MPEG 1/2/2. 5 Layer 3, WMA, OGG MP3 : 5kbps ~ 320kbps / WMA : 8kbps ~ 320kbps / OGG : Up to Q10 ID3 V1 Tag, ID3 V2 2. 0, ID3 V2 3. 0 AVI, WMV, JPEG MPEG4 SP, WMV SP/320x240/15-30fps/Video Bit rate:32-512kbps/Audio Bit rate:8-320kbps Windows 98SE/ME/2000/XP (MTP version : only XP) Series Product Models in the X20 Capacity Continuous Playback Time Connection Type Equalizer Dimensions Weight Operational Temperature Line In/Out&Direct Encoding Display Power Supply Main Set Display AC Adaptor Battery Frequency Range Headphone Output Power Audio S/N Ratio No. All other company or product names are trademarks or registered trademarks of their respective owners. The final version of the product may differ slightly from the pictures and verbal descriptions provided herein. [. . . ] [. . . ]