What's in the box:

Acoustic Guitar Pickup Resonance Pickups Preamp System with Rechargeable Battery (Standard)

The resonance pickup can enhance the vibration of the guitar and boost the effects of delay, chorus and reverb to make the better performance of the guitar.

Features:
The guitar resonance pickup is specially designed for acoustic guitar.
Independent adjustment for microphone and volume allows sound pickup and control more accurate.
Premium vibration unit increases the the guitar's volume, enhancing effects of delay, chorus and reverb.
Built-in rechargeable battery, when full-charged, powers 12 hours for preamp mode, 4 hours for resonance mode.
Convenient and fast installation experience together with complete fittings.

Specifications:
Material: Plastic + Metal
Color: Black
USB Interface: Micro USB
Battery Voltage: 3.7V
Battery Capacity: 600mAh
Package Size: 17.5 * 10 * 5cm / 6.9 * 3.9 * 2in
Package Weight: 235g / 8.3oz

Package List:
1 * Vibrator
1 * End-Pin Jack
1 * Resonance Pickup
1 * Metallic Wire
1 * Winder
1 * Screw Driver