Shenzhen Chitongda Electronic Co.,ltd( Shenzhen wolf-guard security Hi-tech Co.,ltd) is a security products manufacturer with 16  years' experience in China, It's has an advanced concept in products development, strong capability in R&D and production, and an original strategy in market spread. Our company passed the ISO9001, 2000 management system, and also has the CE,FCC,ROSH and other authorized certificates. With "wolf-guard" brand, our products obtain high reputation all over the world.