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If your tablet or phone does not have a very cool sound, These boxes can help a bit. Are mounted on a traditional P2 connector any tablet, cell phone or mp3.
The construction is good and the sound is quite reasonable. Distorts a little, but it works well.
There is no volume control but there is a key on-off switch to save battery when not using.
Runs on two AAA batteries, which can be rechargeable batteries such as those used in photo. Interesting is that the loud sound will not unload the battery from the cell phone or tablet.
In the photo below the speaker is plugged in my tablet V972 WAVE of 9.7 inches. The speakers turn to be positioned as you want.
In the photo below is plugged in my Jiayu G3:
I made up a video showing the difference in volume between the original sound of the tablet V972 and this little box. Check it out:
