Built in Li-ion battery. Built-in 2GB capacity EMS memory. Light and fashional appearance with high definition stereo sound. Introduce new adanced techonoly – Cyber Display, you can enjoy MTV, Music at any time you want. Flexible and adjustable frame design can ease the press on nose bridge and makes it more considerate. Compatible with products with AV/TV-out function such as iPod, VCD, DVD, VCR, DV, MP4, PMP, PSP, PS2, PS3, X-Box, GAME CONSOLE and etc. Display size: QVGA 80" Resolution: 640*480(QVGA) Diagonal size: 35° Image input: AV/TV-Out Working time: Approx. 5hours Charging specification: 5V DC/300mAh Power voltage: 3.3V-5.5V