Shanghai Penghong and its sister company, Qingyue Electronic Technology, with more than ten years of experience in the field of selling and installing of pro audio products with good quality and price.Customization is also one of our service, welcome OEM. We are one of chinese international trading companies, directly supply goods with good quality and price from our cooperating factories,such as food additives , pro audio systems, diamond coring drills, mobile phone fast chargers, vehicle fast chargers and so on. ' Best quality togeth···