1,100%quality authentication 2.famous brand battery,Above 8 hours playing 3.support SD 4.W/camera,pc camera Specifications 1.use better batteries, can ensure the steady running, and protect the player when over charger or over output. stop the power supply when it found the PCB have any short electornics to protect the PCB from destroy.2.can expand the memory by mini SD card, max support 4GB ...