【Mini Carbon Monoxide Detector】It features a "liquid crystal display for easy, real-time reading of values (PPM)" and an "audible and visual alarm." When the concentration exceeds a certain level, the alarm remains unchanged and the red light flashes. You can quickly and clearly understand the concentration in ppm and take appropriate measures to effectively protect your personal safety and that of your property. 【Carbon Monoxide Detector】When the carbon monoxide concentration reaches 100 ppm, the alarm is activated immediately, the red light flashes and the buzzer sounds simultaneously. The high tone of 85 dB can attract your attention more quickly. (Note: A short press of the button can manually silence the alarm sound.) 【Widely Used Carbon Monoxide Alarm】Adopting a high-precision electrochemical sensor, it can quickly detect carbon monoxide. Can be used in the kitchen, bedroom, bathroom, garage, camping, and more. It has passed the EN50291 safety certification, ensuring reliable