AMERICAN RECORDER 4 Channel, Battery Powered Mini Mixer

Compact and battery powered mini mixer is simple to use with four 1/4" unbalanced input channels and one 1/4" TRS balanced output with a master output volume control.  Use with line level audio devices and dynamic microphones. Durable metal case. Up to 20 hours of use on new battery.  Also includes a DC input plug (battery and power supply not included). SPECIFICATIONS MAX GAIN: 24dB INPUT IMPEDANCE: >30K ohm OUTPUT LEVEL UNBALANCED:  +4Db/+10dB (max) OUTPUT LEVEL BALANCED:  +10dB/+16dB (max) FREQUENCY RESPONSE: No less than + or - 1dB (20Hz-20KHz) THD: <0.5% (20Hz-20KHz) NOISE: >80dB  BATTERY: 9VDC CONTINUOUS WORKING TIME: >20 hours DIMENSION: 6" x 3.3" x 2"