Features:

Simply place your device directly upon the speaker and it “magically” amplifies the sound through a pair of 2w speakers
It uses NearField Audio to receive the sound from your devices with an external speaker
Optimized devices and works with most smart phones !#!amp!*! mp3 player with external speaker
USB or 3 x AA batteries powered (USB cable and batteries not included)

Specifications:

Wireless Tech: Interaction
Output Power: 2W * 2
Batteries: AA * 3（not included）
DC in: Micro USB (5V)
Audio in: 3.5mm Stereo

Package included:

1 x Wireless Interaction Amplifying Speaker

Note：we have two style speaker

one need 3 battery

the other  not need battery ，can charger