mp4 player USB.2.0 Capacity: 2G--8G Guarantee period: 2 years ... , support firmware upgrade function Built-in FM radio and recordingsupport multi-language Capacities256MB,512MB,1GB,2GB,4GB,8GB,16GBOperating Temperatures320 F ... lightDual LED indicates power and busy,read / writeShock Resistance1000GMQQ100pcs MP4 player