The Jr. Pro is a small black waistband amplifier with headset that plays music and voice. Amazing volume!! microSD card slot and USB port. Internal rechargeable battery. TECHNICAL DETAILS T.H.D 1% S/N Ratio ≥60dB Frequency response 100HZ-15KHZ RMS 10W DC power supply 9V500mA Speaker 3" speaker 15W max DC 9V input Microphone input sensitivity 50mV (optional) 2GB MicroSD card with SD card adapter $10 (see the option including this in the drop down button above the price where it says Jr. Pro.)
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