1、With this preamp, you spend less time tweaking controls and more time playing. 2、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. 3、A phase switch provides additional feedback control by allowing the phase of the pickup to be reversed in relation to the phase of the amplification speakers. 4、5-band tone controls (Bass, Midd.2, Midd.1, Treble, Presence) for all guitarists looking to improve their sound. 5、Great accessory for acoustic guitars. Features: With this preamp, you 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. A phase switch provides additional feedback control by allowing the phase of the pickup to be reversed in relation to the phase of the amplification speakers. 5-band tone controls (Bass, Midd.2, Midd.1, Treble, Presence) for all guitarists looking to improve their sound. Great accessory for acoustic guitars. Specifications: Condition: 100% Brand New and High Quality Material: Plastic Color: Black Output: 6.35mm Power Supply: 1 x 6F229V (not included) Size: Approx. 97 x 65 x 56mm / 3.8 x 2.5 x 2.2inch Suitable for Acoustic Guitar Weight: Approx. 108g Package Included: 1 x Guitar Pickup 1 x Piezo Pickup 3 x Screws 3 x Nuts 1 x Sticker