We, COMPETITION CO. LTD., located in CHINA, are a professional manufacturer of producing simple DIY video door phones to building intelligent anti-burglar systems and luxury condo and apartment security and communication system. We have more than 10 years experience in the area of security products(video door phone). Our company has grown to be one of the most important largest manufacturer of intercom systems in China. We have earned a position of leadership by focusing on quality every step of the way. Through our strong commitment to Total Quality Control, we constantly seek ways to improve our products and our processes.Our products got the  ISO9001 , CE , FCC certificate.