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.Bass Control: 12dBMiddle : 12dBTreble Control: 12dBPres: 12dBPower: 6F22 DC 9V battery (not included)size:15 x 8 x 6cmMaterial:Metal + plasticcolour:Black+redPackage Contents:1 Set x screws 1 x clamp 1 x pickup stick1 x pickup1 x nutOnly the above package content, other products are not included.Note: Light 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.