... power amplifier Good quility power amplifier Max power amplifier Professional Digital amplifier with USB/SD, FM radio, VFD display Model:ND ... .5dB Power Supply: 110V - 220V S/N Ratio:≥80dB Description 1. With USB/SD input 2. With digital VFD display 3. With ... Karaoke function,2 microphone socket input, digital echo 4. Volume, bass, treble, echo, mic-volume separately control5. ...