Features: 1) With big screen and high resolution display 2) GVD510HMD with 56" screen and 922K pixels resolution offers you clear and exquisite pictures, which makes your watchingfeel true 3) GVD510 has two versions AV and VGA for buyer's options according to different needs, which makes GVD510 meet plenty of user groups. If you need to use it with AV player, choose AV version, on the contrary choose VGA version for computer usage 4) Elaborate design, light and portable structure of GVD510 inherit from GVD310A and GVD410, which enablesyou toenjoyentertainment and work in whatever poses 5) Hi-capacity lithium battery for permanent power supply and convenient usage 6) The lithium battery LP1100 can supply power for5 consecutive hours, making the user more convenient while traveling Specifications: 1) Display size:56 inch 2) Pixels: 640H x 240V RGB (922k) 3) Viewing angle: 28 degrees 4) Signal input: composite AV (special notice is necessary for VGA signal) 5) Sound function: double-channel stereo 6) Adjustment function: variable volume, picture contrast and brightness 7) AC Power input: 100V - 200V / 50Hz (input through adapter) 8) Power consumption: 1.5W 9) Weight: 190g 10) Accessories: AC adapter, eye patches, cables 11) Optional parts: LP1100 lithium battery, wireless adapters (only for composite AV input) Packing: Giftbox dimensions: 285 x 200 x 85mm