Wireless speaker two methods, the first kind to buy a self-powered (with batteries) Bluetooth receiver module, the audio input signal line directly inserted in the module, through Bluetooth transmission can be, but need to charge it.
The other is the built-in Bluetooth module integrated board, itself is only a Bluetooth integrated module, which needs to be powered separately according to the voltage, and the signal output is mostly dedicated pin plug or welding, but the installation requires certain electronic equipment use and application technology.