Artec ETN-4 guitar 4 band EQ pre amp with Chromatic tuner E21 

The EQ is flat for fitting to a curved surface on an acoustic guitar

- High Quality & New silver face design

- Multi-functional preamp - Blender + Tuner

- Slim shape - 45mm width

- Easy readable FND chromatic tuner

- Easy & fast installation without screw holes

- Innovative battery compartment

Bass [-10dB ~ +10dB],

Middle [-10dB ~ +10dB],

Treble [-10dB ~ +10dB],

Presense [-10dB ~ +10dB],

Low Battery Indicator LED

Use 2.5mm allen key to fit the EQ

Dimension: H:90, W:45, D:50 (mm)

Output:å 3.5mm jack

Piezo Input: 2.5mm jack,

Aux input: 3.5mm jack