Feature: 1. Safe Use: The CO gas alarm can monitor both CO and gas leakage, ensuring home safety for your families, can be a reliable and durable alarm. 2. High Sensitivity: The CO gas detector uses advanced sensing technology to provide rapid detection of CO or gas concentration changes, providing real time warnings, ensuring your safety. 3. Durable Material: The CO gas leakage alarm is made of durable and reliable material, high strength and wear resistant, ensuring its stability and reliability, having long service time. 4. Easy to Install: The CO gas monitor alarm has a simple installation, convenient and time saving, don't need too much tools or complicated steps, can be used anywhere at home. 5. Sound And Light Warning: When the concentration of CO is detected, a high decibel alarm and high brightness flashing light will be issued to remind the user to take timely measures. Specification: Item Type: CO Gas Alarm Material: ABS Applicable Gases: CH4 and CO Sampling Method: Natural Diffusion Sensors: Semiconductor Sensors and Electrochemical Sensors Alarm Setting Value: CH4 5LEL % ± 3LEL CO Alarm Value: No alarm is issued at levels below 50 PPM. When the concentration is 50 PPM to 99 PPM, an alert will be issued within 60 to 90 minutes. When the concentration is 100 PPM to 299 PPM, an alert will be issued within 1 to 40 minutes. When the concentration is greater than or equal to 300 PPM, an alert will be issued within 3 minutes. Ambient conditions: The indoor temperature is -10℃ to 55℃, and the relative humidity is less than or equal to 95% RH. Response Time: Less than 30 Seconds Recovery Time: Less than 30 Seconds Alarm Mode: Sound and Light Alarm Alarm Volume: Greater Than or Equal to 70dB (1 Meter Straight Ahead) Power Consumption: Less than 3W Measurement Range: 0-20% LEL for CH4, 0-999PPM for CO. Package List: 1 x CO Gas Alarm1 x Base2 x Screw2 x Expansion Screws1 x English Instruction