Portable Carbon Monoxide Detector 1-Range 0~999ppm 2-long working life 3-Battery ... -999PPM;4.LCD Backlight: blue;5.Main Functions: settable alarm point, silence, low voltage warning, malfunction warning, outrange warning, density value ... ;10.Static Current: ≤15uA/ Average Alarm Current: ≤30mA11.Sensitivity Control Point (Factory Default): 100PPM, setting range: 50-900PPM (setting precision: 10PPM ...