Features: Sensitivity/Alarm Time: Within 60-90 minutes at 50ppm CO concentration; Within 10-40 minutes at 100ppm CO concentration; Within 3 minutes at 300ppm CO concentration LCD Display (Optional): 4-digit LCD display Audibility: 85dB (at 1m distance), frequency 3-0.5kHz Standby Current: < 50A Alarm Current: < 50mA Standby Mode: Green LED flashes once every 30 seconds Alarm Mode: Red LED flashes quickly 4 times with a beep every 5 seconds, then repeats Low Battery Indicator: Beeps every 30s when battery is below 3.3V with green LED flashing and Lb on LCD Malfunction Indicator: Beeps every 30s with green LED off and Err on LCD Power Consumption: 0.3mW Size: 11 x 4cm Powered by: 3 x AA Batteries (not included) A perfect item to protect your family from the dangers of carbon monoxide Advanced protection level, easy to read with digital display, even in low light conditions Displays the level of carbon monoxide detected by the device Green LED: Flashes every 30 seconds to indicate the