With over 20years of experience in line of wire/wireless alarm system ,surveillance system and two-way speaking video and vision system .Shenzhen Security Group Co.,Ltd has become the biggest manufacturer of safe and security products in China .and we have obtained the authentication of CCC.CE ,FCC,ROHS and UL. So far ,our products have been well marked in 107 countries and we have successfully developed 32 projects for oversea customers on the basis of OEM and ODM service .Since we count on long-standing business relationship Shenzhen Security Group Co., Ltd .deserve good reputation on quality and service in the long term .