Kmise Z4876 Acoustic Guitar Preamp 5-Band EQ Equalizer Pickup Tuner PS-500 With this spend less time tweaking controls and more time playing Instead of just an switch, the tone shaper features an actual loudness contour control so that you can precisely determine the level of the contour and get the right sound 5-band tone controls (BASS,MIDD.L,MIDD.H,TREBLE,PRESENCE) for all guitarists looking to improve their sound