Kingebai Carbon Monoxide Detector Combo, Smoke Alarm and Carbon Monoxide Detector with Sound Warning and LCD Display Battery Operated Smoke CO Alarm 1 Pack

Why choose us? 1. Adopted with high quality built-in photoelectric and electrochemical sensor with high accuracy 2. Equipped with large LCD screen and different color indication for different status 3. Battery operated with battery monitoring, replace batteries when LCD shows “LB” 4. The smoke detector and carbon monoxide detector's Auto-Check System will real-time check sensors, the LCD display will show the current value of the gas concentration, meanwhile emit an alarm sound of 80 decibels, and the ring light flashes rapidly! Test the alarm First, HOW TO TEST IT(3 steps): Step 1: Install the batteries in clean air , then press the test button for five seconds to test the units electronics, beeps will sound if it's normal; Step 2: Leave it in clean air for one minute; Step 3: Then put it into a sealed bag, spray some smoke or CO gas into the bag and seal it. Waiting for about one minute, the Alarm will go off if it's normal. [NOTE: DO NOT test it by directly burning something under this alarm, which is an invalid test.] Specification Name: Smoke & Carbon Monoxide Alarm Detector Material: ABS Power supply: 3*1.5V AA (not included) Applicable gases: Smoke and carbon monoxide Sampling method: Natural diffusion Smoke Sensor Type: Photoelectric CO Sensor Type: Electrochemical Smoke sensitivity: 0.1%db/m~9.9%db/m CO sensitivity: 000-999 PPM Relative humidity: 10~95%R.H Working temperature: -10?~+55? Alarm mode: Buzzer &LCD screen display Alarm sound: ?75dB Size:4.38*4.38*1.66inch Weight: 180g Installation Steps: Insert the battery into the compartment correctly according to the indication. Choose the right location, which is usually center of ceiling in the detection space.(Use recommened in bedroom, hallway, basement, car or anywhere people stay for a long time.) Secure the detector base to the selected mounting positio