EMPIRE Black Retractable USB Data Cable for BLU Advance 4.0 Specially designed retractable USB data cable for BLU Advance 4.0. Transmit data up to 480 Mbps. Error free high speed performance. Sync contacts, music, ringtones, and other types of media to and from device to either your PC or Mac. Charging functionality available (phone must support this). EMPIRE is a registered trademark with the USPTO.