What's in the box:

Acoustic Guitar Passive Tone and Volume Control EQ Equalizer Preamp Amplifier Piezo Pickup Tuner with 6.35MM Plug (White)

Features:
This equalizer helps to do passive tone and volume control of your guitar.
You can spend less time tweaking controls and more time playing.
No need of battery.
1 pick to amplify the sound.
1 small sticky plate helps to fix the power leads.
2 mounting screws connect the guitar firmly.
The wire plug is 6.35mm.

Specifications:
Features: Passive
Frequency response: 20Hz-20KHz
Volume: A500KO
Tone: B500KO
Pick-up: Piezo ceramic pick-up
Item color: Black
Item size: 6 * 3.5 * 3.5cm / 2.4 * 1.4 * 1.4in
Item weight: 62g / 2.2oz
Package size: Approx. 11 * 7 * 6cm / 4.3 * 2.8 * 2.4in
Package weight: 81g / 2.9oz

Package list:
1 * EQ
1 * Pick
2 * Mounting Screws
1 * Screw Cap
1 * Metal Washer
1 * Sticky Plate
1 * Cable Tie