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-The system is mainly by the single-chip modules and GSM text messages, with the most reliable, most mature GSM mobile network, the most intuitive of the Chinese form of short message or telephone directly to the alarm location to your cell phone to reflect on the screen