Single gas detector: triple alarm , imported sensors, waterproof, dustproof and explosion-proof. Sound/light/vibration alarm: triple alarm prompts the quality to be safer and more reliable. Waterproof/dustproof/explosion-proof: The use of high-density environmentally friendly materials can effectively protect the safety of the machine. Imported quality sensor: faster and more stable, using imported sensor, long service life, fast response speed and more accurate detection. Chinese/English LCD : Chinese and English bilingual can be switched to meet different customers., Manufacturer: GUYSGNX