Speaker, Amplifier manufacturer / supplier in China, offering Customize 8 Inch J-B-L Box Outdoor Wireless Speaker Karaoke Bluetooth Trolley Speaker with Colorful Light, OEM Super Sound 80W High Power 12/15 Inch Outdoor Trolley Speaker with Equalizer DSP Functional, Factory 15 Inch Outdoor Wireless Speaker Big Power Karaoke Bluetooth Trolley Speaker with Microphone and so on.