usb charge function - did not come with a usb wall charger. however when plugged into one will not charge. It will revive the system when plugged in an will automatically switch it on (perminantly) but system shuts down as soon as disconnected from wall. will not collect charge - cable fine - used to download songs from laptop. Will charge from laptop using usb if devise previously switched on. But does not charge when connected via non specific usb wall plug.