... in Japan 3, Visual and audible alarm function 4, Alarm Current: 25mA 1.85 decibel alarm sound.2.The electrochemical carbon monoxidesensors. ... ,Green LED flash button, every second, once one Minutes, alarm will be displayed on the screen.8.test/reset button ... -90 minutes 100ppm, alarm in 10 ~ 40 minutes 300ppm, alarm in 3 minutes13.Standby current:≤10uA "(LCD)," 5uA (LCD).14.Alarm current:≤25mA15.Range: ...