Interface Type: USB 
Communication: Wireless  
Speaker Type: Mini 
Playback Function: MP3 
Wireless Type: Bluetooth 
Material: Plastic 
Battery: Yes 
Design: Cool, Fun, Mini, Multifunctional, Portable 
Supports: Bluetooth, Hands-free Calls, Microphone, Volume Control 
Functions: Stereo 
Connection: Wireless 
Interface: Micro USB, Power Charge Port 
Audio Source: Bluetooth Enabled Devices 
Material: Metal, Rubber 
Charging Voltage: DC 5V 
Battery Capacity: 400mAh 

Compatibility for all devices which have a bluetooth function, like Tablet PC, Laptop, PSP, TV, Computer, etc... 

Note: 
1. Do not drop the speaker into the water. 
2. You can press the phone call button twice quickly to redial the last phone call.