Feaures: 50inch 4:3 wide screen virtual display, None radiation LCD panel Enjoy movies, music, photos and favorite books everywhere you go Built-in 4GB flash memory for mega storage and play of media files USB interface allows easy and high speed file uploading Sleek ergonomical design, comfortable wearing, light weighted as lower as 70grams Support multimedia video format like RM, RMVB, Super dynamic quality sterero sound effect Memory Card Slot: Micro SD card slot, support max 32 GB Specs Virtual Screen Size:50inch away 2meters virtual distance Screen Resolution: 432*240, Screen Ratio: 4:3 Firmware upgradable, 8 Desktop pictures selectable Color Depth: 24 bit, Audio output： Stereo Viewing Angle: 26°Diagonal Audio Distortion: 0.03% USB2.0 High speed data transfer, 4MB/S Operation ambient Temp -5C-+40 C Power Duration: 2-3 hrs. Power Consumption: 0.9W Frequency Response: 20Hz-20KHz Sample Rate: 8-16Khz, SNR >85db Power Supply: DC 3.7V/500mAh, AC: 110-240V Video Format: RM/RMVB/Mpeg/AVI/FLV Music Format: MP3, WMA, Flac and APE; Music Feature: Diversified folders, playlists, edit. Ebook feature: Bookmark, Page jump, Txt Color, Txt Size,Browse Mode, Auto-paging, Reading style Picture format: Jpeg, BMP, GIF, feature: Rotate, Zoom, Slides, Auto-browse. Multilanguage support: Zh, En, De, It, Pt, NL, Fr, Es, PL, Ru,Tr,Da, Cs, Ja,Sk, Kr. IL,Ar. Eg Accessories: USB Cable, USB Charging Cable, AC Adaptor, User Manual, Carry Case