1, Wall-mounted structure with elegant appearance is simple to install without debugging; 2, Can detect and set alarm on leak of natural gas, liquefied gas and gas by combustible gas sensor; 3, Equipped output control touching point can be used for control of ventilation facilities and gas pipe valve shut-off; 4, Central 12-24V power supply with buzzer can send independent audio and video alarm., can be used independently or united with controller or disposed with security system.