Extension tube: Small in size but big in bass.
Tumbler Design: Relaxing yourself.
Pocketsize portability: Small enough and carry around on a daily-basis.
Volume control: Through the volume adjuster of MP3,mobile telephone, notebook PC,PC,MP4,DVD&VCD.
Built-in Rechargeable Battery: Cost efficient & daily convenience.
Easter Egg Tumbler Speaker x 1
Input audio cable x 1
USB power cable x 1