Shenzhen Chitongda Electronic Co., Ltd.(Shenzhen Wolf-guard Security Hi-tech Co.,Ltd.), the pioneer of the home security system, goes forward and ch- allenges the difficulties with the effci ency and persistence. 10 years of struggle, Wolf-guard's home security system become the first brand in home security field.With inno- vative spirit, the high quality and ful1 range home security products provide the excellent solution for people. We provide the following main product:GSM alarm system,Car alarm system,Auto-dial Alarm Systems,Intelligent Home Control System, CCTV system, DVR all kinds of PIR, gas and smoke detector,etc.