Description: 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. It features an actual loudness control so that you can precisely determine the site and get the right sound. This is essential for your guitar performance. Really change the mood and feel of a song or chord. Under the saddle pickup for acoustic guitar. Pre-wired for easy assembly. Low battery check LED. With digital tuner. Features: 100% and unused Presence Control: ±12dB at 8KHz Bass Control: ±12dB at 600Hz Middle1 Control: ±12dB at 600Hz Middle2 Control: ±12dB at 600Hz Treble Control: ±12dB at 2.2KHz Input Impedance: 10Mω Frequency Response: 20Hz - 20KHz Size: 5.8cm x 9.8cm x 4cm - 2.3inch x 3.5inch x 1.6inch. Power: 9V alkaline battery (battery not included) Package include: 1 x 5 Band Guitar Tuner Pickup Set ( battery not included )