Aker voice amplifier co.,ltd, specialized in manufacturingever since 1982. with the strength of lithium battery powered amplifiers,with functions ofVoice amplifier,mp3 player,i-phone music player,usb player,for teachers,tour guiders, promotion ...

Guangzhou Lansi Audio Technology Factory was founded in the 1990s,specializes manufacturing of sound boxes,2.0/2.1/5.1 speakers, Karaoke boxes, multimedia professional speaker and mixer. is a professsional set independent reseach development ...