OP-4PH
Function: 4Band EQ & Phase
Input impedance:10MΩ
Frequency Response:20Hz~20KHz
Control Range
Bass:±12dB at 60Hz
Middle: ±12dB at 650Hz
Treble: ±12dB at 2.2KHz
Presence: ±12dB at 10KHz
Phase Reverse Switch
Master Volume
Automatic Low Batt-check LED
Battery:9V Alkaline Battery