Features:
Pickup? tuner and equalizer system for acoustic guitars.
BASS? MID?TREB control knobs and PHASE function.
With master volume control and low battery check LED.
Manual guitar tuning mode.
LCD color screen showing tuning information.

Specifications:
Material: Plastic
Frequency Response: 20Hz~20KHz
Control Range: Bass -- ±10dB
Mid -- ±10dB
Treble -- ±10dB
Power Supply: 1 * 9V Battery (not included)
Package Size: 9 * 5.5 * 9cm/ 3.5 * 2.2 * 3.5in
Package Weight: 105g / 3.7oz

Note:
Battery is not included.

Package List:
1 * Guitar Pick-up System