What's in the box:

Electronic Piano Keyboard Silicon Flexible Roll Up Piano with Loud Speaker

Features:
88 keys Piano with Midi interface.
Has 23 demonstration songs, 100 kinds of rhythm, 128 kinds of tones and 12-stage volume adjustable.
Built in louder speaker.
Also with earphone jack, can connect with external speaker.
LED digital display.
Can be rolled up for easy storage and carrying around.

Specifications:
Keyboard model: 88 keys
Tone: 128
Rhythm: 100
Demonstration songs: 23
Powered by: 4 * AAA batteries(not included) or DC 5V
Material: Silicon
Item size:
Main body: 9 * 23.5 * 2.7cm/ 3.54 * 9.25 * 1.06in(L * W * D)
Keyboard: 133 * 14.2 * 0.6cm/ 52.36 * 5.59 * 0.24in (L * W * D)
Item weight: 1020g/ 2.249Lb
Package size: 34 * 23.5 * 6.5cm/ 13.39 * 9.25 * 2.56in
Package weight: 1480g/ 2.363Lb

Package list:
1 * 88keys Roll Up Piano
1 * Power Adapter
1 * Foot Pedal
1 * User manual