LSENLTY 2-in-1 Smoke and Carbon Monoxide Detector

2-in-1 Smoke and Carbon Monoxide Detector: The combined smoke and CO detector uses a photoelectric smoke sensor and an electrochemical CO sensor to detect smoke and carbon monoxide faster and more accurately. The concentration range of carbon monoxide is 0PPM-999PPM, and the detection range of smoke is 0.1%-0.9% db/m 180-day long battery life: Use 3 2AA batteries (including), support 180 days of long battery life. The sensor life is up to 10 years, supporting long-term use. When the battery level is low, the red light flashes on time every 10 seconds, and the LCD displays "Lb". Just simply replace the battery and it will be used Combined alarm with CO reading: When the carbon monoxide concentration exceeds 30PPM, the alarm will be triggered and the red light will flash, and the LCD will also display the CO concentration and light up. When the smoke concentration exceeds 0.1% db/m, the alarm will be triggered and the blue light will flash. In standby mode, the LCD turns off to ensure y