Features: This small CO detectors with large screen continuously monitors carbon monoxide levels, temperature, and moisture for comprehensive home safety. Features 85dB alarm for immediate alerts during CO spikes and plugs in operation for easy maintenance without battery replacements. Ideal for family with children/elderly and pet owners needing reliable indoor air quality monitoring in nurseries or living areas. Perfect for homes, offices, or pet room requiring immediate environmental trackings to prevent hazardous conditions. Combines gas analysis, climate sensors, and user friendly design for enhances safety in residential or light commercial space. Specifications: Material: plastic Size: about 60x60x105mm/2.36x2.36x4.13inch Product name: Carbon monoxide detectors backups current: <15uA CO gas detection ranges: 0-999ppm Alarm standard (UL2034 standard): ≥70±5ppm, alarm within 60-240 minutes; ≥150±5ppm, alarm within 10-50 minutes; ≥400±10ppm, alarm within 4-15 minutes Temperature measurement ranges: 32-212°F (1.8°F) Use environment: Temperature: -10°C ~ 55°C Alarm method: sound and light alarm Alarm capacity: >85dB (within 1 meter) Relative moisture ranges: 0-99% (3% soil) Relative moisture : <95% (no condensation) Working electric: 90~240V Alarm current: <30uA Supporting large display sensors: Electrochemical sensors Package Includes: 1xCO detectors note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.