What's in the box:

Acoustic Guitar Bass Treble Tone and Volume Control EQ Equalizer Preamp Piezo Pickup Tuner Amplifier with Active Line 6.35MM Plug

Features:
This equalizer preamp helps to adjust the tone and volume of your guitar.
You can spend less time tweaking controls and more time playing.
You can control bass, treble and volume.
Low battery signal, the low batt will light when it is in low power condition.
1 pick to amplify the sound.
1 small sticky plate helps to fix the power leads.
4 mounting screws connect the guitar firmly.
Connecting wire with 6.35mm plug.
Powered by 9V Alkaline battery (not included).

Specifications:
Bass: +/-12dB at 100Hz
Treble: +/-12dB at 10KHz
Power: 9V AIkaline battery
Battery Life: Over 350 hours
Pickup: UK-2000Piezo cable pick-up
Item color: Black
Item size: 6 * 4 * 5cm / 2.4 * 1.6 * 2in
Item weight: 58g / 2oz
Package size: Approx. 11 * 7 * 6cm / 4.3 * 2.8 * 2.4in
Package weight: 76g / 2.7oz

Package list:
1 * EQ
1 * Connecting Cable
1 * pick
4 * Mounting Screws
1 * Screw Cap
1 * Metal Washer
1 * Sticky Plate
1 * Cable Tie

Note:
The batteries are not included.