... authentication 2.famous brand battery,Above 8 hours playing 3.support SD 4.W/camera,pc camera Specifications System requirements HardwareIBM ... quality:64kbps/16KHZ,general quality:32kbps/8khzFM Frequency Range87.2-108MHZ/76-90MHZFM scan Methodanuak/Automatic searchcharge2-3 hoursBattery ... ( 30% deposit in advance+balance before delivery), L/C;2.Lead time: <500pcs,7 working days; <2000pcs,15 working ...