?with tuning function is specially designed for guitar which has color knobs to control bass・ middle・ treble and presence tone. It has full tone color・ stable sustain effect・ keeps sound clarity output power・ perfectly match with most bridge style pickup. And its excellent design・ you can go anywhere with it that does not take up space at all.<br><br><B><span style="font-size:14px;">Features:</span></B><br>5-band EQ with tuning function for guitar・ the basic element to enhance your music experience.<br>More accurate・ high sensitive and wide tuning range.<br>Volume・ bass・ middle・ treble・ presence color silicon control knobs・ convenient to use and stable adapterization.<br>Powered by one 6F22 9V battery(not included)・ low consumption and long lifespan.<br>LED indicator・ remind you to replace the battery in time. <br><br><B><span style="font-size:14px;">5 Band EQ:</span></B><br>(Bass) ＼12dB at 75Hz<br>(Middle 1) ＼12dB at 750Hz<br>(Middle 2) ＼ 12dB at 1KHz - 2KHz<br>(Treble) ＼ 12dB at 10KHz<br>(Presto) ＼ 12dB at 15KHz <br><br><B><span style="font-size:14px;">Tuner:</span></B><br>A4 Frequency: 440Hz<br><br><B><span style="font-size:14px;">How to tune:</span></B><br>Press shortly TUNER to power on with tuner mode・ the output is mute.<br>Play a single string・ if the screen is white・ the note is out of tune・ if the indicator stays vertical and the screen is green・ the note is in tune.<br>Press shortly TUNER to power off. <br><br><B><span style="font-size:14px;">How to use EQ:</span></B><br>Connect to amplifier with amplifier output jack by connecting cable・ adjust EQ frequencies and volume to a proper value・ then you can begin to practice or play your instrument.                 <strong>Brand:</strong> JOYO <br />             <strong>Model  :</strong> EQ - 505 <br />                          <strong>Package weight:</strong> 0.1933 kg <br />             <strong>Product size (L x W x H)  :</strong> 7.3 x 4.8 x 2.5 cm / 2.87 x 1.89 x 0.98 inches <br />             <strong>Package size (L x W x H)  :</strong> 10.2 x 6.7 x 6.7 cm / 4.01 x 2.63 x 2.63 inches <br />             <strong>Package Contents:</strong> 1 x EQ - 505 5 Band EQ Guitar Pickup Preamp Tuner