[. . . ] NOMENCLATURE ELECTRIC ACOUSTIC GUITAR Owner's Manual Thank you for choosing a Yamaha electric-acoustic guitar. [. . . ] 450 hours · Hexagonal wrench for neck adjustment x1 · S-006P (6F22) dry cell battery x1 THE CONTROLS BATTERY REPLACEMENT Be sure to replace the battery as soon as possible when the battery check indicator lights in order to avoid reduced sound quality. * Be sure to remove the battery if the instrument will not be used for an extended period of time in order to prevent possible damage due to battery leakage. q Press the catch on the battery holder in the direction indicated by the arrow in the illustration in order to unlock it. w Slide out the battery case. q e w r Battery case OP EN q VOL. (Volume) Control Adjusts the overall output volume level. * Make sure that the VOL. is turned to "0" before connecting or disconnecting. OP EN w BATT. [. . . ] The range is from 80 Hz to 5 kHz. * This control has no effect when the MID equalizer control is set to its center ("0") position. [. . . ]