CO2 Detector Meter Air Analyzer Gas Detector Carbon Dioxide Sensor Co2 Monitor 5000ppm Temperature HumidityThe two-channel NDIR sensor used in the CO2 detector prevents cross-contamination of CO2 with other gases and is characterised by high accuracy, reliability and a long service life (up to 15 years). The housing is made of fire resistant material compatible with safety and durability. It displays real time CO2 data, real time temperature and real time humidity data, and has four concentration levels and three alarm alerts.Alarm symbols and audible alerts: The carbon dioxide detector has 2 alarm alerts, 4-colour LEDs and an audible alert function to make air quality more intuitive. (0-500ppm shows green; 500-999 shows yellow; 1000-1499 shows orange.(Above 1500 shows red) Alarm didi twice above 1000, 15 seconds above 1500, 15 seconds above 2000; sound alarm can be turned off manuallyLong battery life: The rechargeable lithium battery has a capacity of 1400 mAh and a standby time of 9:30 hours, supports USB charging and battery indicator.Multiple placement effects: The CO2 detector has 2 types of placement effects, it can be placed standing up or hung on the wall, and the product is equipped with a 2m charging cable, which can be used in special scenarios, such as stations, hospitals, etc.Safe and fireproof materialColour:whiteMaterial:ABSSize:102 x 52 x 140mm Package Contents:1 set x indoor air quality metersOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.