We are the professional manufacturer of Portable PA system & wireless microphones who located in Section No.437 of Dongchong,Shinan road,Dongchong town,Nansha district,Guangzhou city, Guangdong province, China. Our company, formerly known as Yainky Sound Equipment Factory, in order to develop our business to overseas better, we found our company SHIER to serve out client better in 2009. We have been specializing in PA systems and wireless microphones for over 8 years and have CE & ROHS approved