HY-H7 GSM alarm system adopts the up-to-date digital sensor and transfer technology, which integrates Burglar, Fire and Gas Leakage protection. With the advanced GSM wireless network digital signal processing technology and automatic temperature compensation, the alarm host is characterized with LCD menu, English image-text display, Touch-screen and Multiple languages, voice, SMS, RFID identification, and CONTACT ID protocol. Users can control remotely and set the alarm system by App. When alarm happens, it will start up the siren and informs the users by calling and SMS. H7 Alarm System is widely applied in houses, working offices and factories with its fashionable design and multiple functions. Many wireless detectors can be enrolled with the host.