本系统主要由单片机和GSM短信模块组成，借助最可靠、最成熟的GSM移动网络，以最直观的中文短消息或电话形式，直接把报警地点的情况反映到您的手机屏幕上-This system is mainly composed message Singlechip and GSM modules, with the most reliable, the most sophisticated of the GSM mobile network in the most intuitive of the Chinese short message or telephone, directly to the alarm location is reflected to your cell phone screen