It can change the wired to wireless and normal speaker to wireless bluetooth speaker.
It can match cell phone and ipad which have bluetooth , then achieve wireless speaker.
It can transform the music in the audio equipment to wireless playing music.
Compatible with Bluetooth 2.1
Support for A2DP V1.2
5V DC charging
External power source: Yes
Transfer rate: 10（Mbps）
Transmission distance: not less than 10 meters
Working frequency: 225（MHz）