CP-02 USB SD SLOT portable speaker 1, AC power supply 240V/ ... ), 2 * 100W digital power amplifier, so efficient, light weight, easy to carry 3, USB \ SD digital player, with digital display 4 ... : 15 dB EQ circuit: 60Hz-10Khz (5 months-frequency point) to upgrade the attenuation Plastic Case Speakers with 2 x 5 ...