APPLICATION: This pick-up equalizer system with 5 bands can be easily fitted into your acoustic guitar and it is essential to electrify and amplify their sound. LOUDNESS CONTROL: It features an actual loudness control so that you can precisely determine the site and get the right sound. NICE ACCESSORY:This is essential for your guitar performance. Really change the mood and feel of a song or chord. FINE WORKMANSHIP: It gives you a comfortable Press through their unique design. Advanced manufacturing process, durable for long time use.<br><br>Bass Control: ±12dB Middle : ±12dB Treble Control: ±12dB Pres: ± 12dB Power: 6F22 DC 9V battery (not included) size:15 x 8 x 6cm Material:Metal + plastic colour:Black+red<br><br>Package Contents: 1 Set x screws 1 x clamp 1 x pickup stick 1 x pickup 1 x nut<br><br>Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.