[. . . ] In order to make the most of the advanced features and performance provided by your guitar, please read this manual carefully before using the instrument. Be sure to replace the battery as soon as possible when the battery check indicator lights in order to avoid reduced sound quality. [. . . ] q Press the catch on the battery holder in the direction indicated by the arrow in the illustration in order to unlock it. e Remove the old battery from the battery case, and insert the new battery making sure that the (+) and (­) terminals of the battery are positioned as shown in the illustration. r Slide the battery case back into the battery holder and press firmly so that the battery case locks into place. q w, r Battery case w OP EN EN OP PRECAUTIONS The output jack is an EIAJ-standard 1/4" phone jack. indicator lights. SPECIFICATIONS System SYSTEM-58: Monaural 1 way Pickup Bar Sensor (Piezo type) Pre-amplifier Controls VOL. , 3 Band (HIGH, MID, LOW) EQ control, AMF control e 3 Band Equalizer LOW : Boosts or cuts the level of the low frequencies. The AMF control r adjusts the center frequency of the band affected by this control. MID Output jack Output impedance Power supply Battery life Combination end pin/power switch 1 k 9V DC, S-006P (6F22) dry cell battery Approx. * Varies according to operating conditions. r AMF Control Sets the center frequency of the band of frequencies affected by the MID equalizer control. [. . . ] * Varies according to operating conditions. r AMF Control Sets the center frequency of the band of frequencies affected by the MID equalizer control. [. . . ]