Detailed product description Support mp4. 1.5/1.8 inch cstn full color screen. Movie and mtv player, synchronized video and audio display Built in two speakers Supports various video formats convert to mtv format: rm / mov / vob / wmv / asf/ Mpeg / avi / dat Usb2.0, fast download speed Id3 support, lyrics display Sp/lp digital recording function Electronic album, digital fm radio function Play mode: repeat a-b, repeat one, repeat all, repeat catalog, follow read, etc. Eq modes: jazz, classic, rock, pop, normal, soft, dbb Multilingual support: such as english, simplified chinese and traditional chinese No driver is needed above windows 98 Built-in powerful rechargeable li-polymer battery Usb hdd boot function Built-in lithium ion battery Function key: play/pause, previous, next, volume +/-, power on/off Specifications: Memory available: 128mb/256mb/512mb Support music format: mp3&wma&wav Compression rates (mp3) 8kbps-320kbps in constant bit rate at 8/11/16/22/32/44.1khz Sampling rate Compression rates (wma) 64kbps-128kbps in constant bit rate at 44.1khz sampling rate Join speed: usb2.0 Frequency response: 20hz~20khz Distortion: 86db Earphone output power: max. 9mw at 32 ohms