A manufacturing method of a bubble-type micro-pump is provided. The LED light emitting module is disposed on the lamp body. The cable tester can also include a receiver that samples the returned signal from the cable and adaptively filters the returned signal based on the training signal and a controller that determines the cable length from the adaptive filter tap coefficients. This force causes a mechanically weak portion in the bottom of the container to break, thus allowing a mixture to fall from the container into the drinking water. The same core can be encased within a plurality of intermediate layers having either increasing hardness or decreasing hardness to provide selective golf balls for either low swing speed players or advanced players. Each of the master units is addressable over the network by the control unit enabling the control unit to control the contour, spectral band, and gain characteristics of the audio output signal.