JOYO JE-36 Guitar 4-Band EQ Tuner Pickup Equalizer - Black
Feature: Bass: ±12dB~80Hz; Alto voice1: ±12dB~500Hz; Alto voice2: ±12dB~1KHz-2KHz;Tenor: ±12dB~3KHz;High pitch: ±12dB~10KHz; Low-Vottage Display; A4 frequency: 440Hz;Tuning range: 0A(27.5Hz)-8C(4186.01Hz); Included 1 x 6F22 9V Battery;