Four Times The Resolution of Standard ezVision     64 inch Virtual View ezVision's optical system simulates a 64" TV screen with a 4:3 aspect ratio when viewed at a distance of 8.5 feet. Ultra Lightweight ezVision's video glasses weigh in under 4.0 ounces (60 grams) making them fit and feel like you are wearing a pair of glasses. 5 Hour Battery The ezVision Video Glasses uses a Lithium Ion rechargeable battery pack which lasts up to 5 hours long for the X4.  Additional batteries are available for longer viewing. Ultra Slim Battery Pack The battery pack is just 1/2" thick and includes your power switch and volume control. Built-in Earphones The ezVision has built-in quality earphones.  The earphones include an integrated earphone holder and a coiled cable to keep the wires neat. iPod/Zune/Zen Compatible The ezVision Video Glasses are completely compatible with your iPod.  For iPod video, a small adapter cable is all you need.  For the new iPod Touch, iPod Classic, or iPod nano, you can get the iPod Composite A/V Cable from Apple to connect to the ezVision. DVD Player  Ready The DVD adapter cable allows you to connect the ezVision to virtually any device that offers video output.  DVD players, Multi-media MP3 players, VCRs, or even your satellite receiver. Privacy Now you can watch TV in privacy.  Whether you are on a plane or you're a night owl and don't want to disturb your partner, the ezVision allows you to watch in complete privacy. Wall Charger Included Unlike other products that require you to purchase your wall charger and extra components separately, the ezVision is a complete solution and includes everything you need to enjoy it, right out of the box.   Also See the ezVision G1 - 50" Screen