What's in the box:

Vitoos Electric Guitar Plug Mini Headphone Amp Amplifier Marshall Plexi Sound Compact Portable (Black)

Features:
Compact and light-weight design, easy to carry.
Built-in distortion effect.
Designed with 3 adjuster: Drive, tone, vol.
6.35mm/0.25in plug, just plug into guitar jack, no need of installation.
Aux in jack lets you play along with cellphone or MP3 player.
Comes with a splitter plug allow you to connect two headphones simultaneously.
Powered by built-in rechargeable lithium battery.

Specifications:
Housing material: ABS+PC
Power: Built-in rechargeable lithium battery
Current: Max.15mA
Product size: 8.7 * 8.1 * 2.9cm / 3.4 * 3.2 * 1.1in
Product weight: 51g / 1.8oz
Package size: 18 * 13 * 3.1cm / 7.1 * 5.1 * 1.2in
Package weight: 116g / 4.1oz

Package List:
1 * Guitar Plug Headphone Amp
1 * Cable (male to male)
1 * USB Cable
1 * Splitter Plug