CO PPM Detector Warning Siren Alarm Carbon Monoxide Detector 85dB Sound with LCD Indicator Safe Sensor Home Security Protection

CO detecter Features: Within 60~90 minutes at 50ppm CO concentration; Within 10~40 minutes at 100ppm CO concentration; Within 3 minutes at 300ppm CO concentration Standby Mode: Green Led flashes once every 30 seconds Alarm Mode : Red Led quickly flashes 4 times with unit chirping every 5 seconds, then repeat, Low-battery Indicator Alarm:Chirp every 30s as battery lower than 3.3V with green LED flashing and Lb on LCD Mal-function Indicator:Chirp every 30s with green LED out and Err on LCDLCD Displayer (optional): 4 digits LCD Audibility: 85dB ( at 3m distance ), Frequency 3 - 0.5KHZ Standby Current: <80μA Alarm Current: <80mA Aoltage:DC 4.5V Power consumption: 0.3mW Size: 10 x 4cm Powered By: 3 x AA Batteries (Not included)