Item No.: C99AX135
.Gas tested：CO in the air  
.Backlight LCD display  
.Measuring range：0~1000ppm  
.Resolution：1ppm  
.Minimum reading：1ppm  
.Accuracy：±5%（f.s）or ±10ppm  
.Response time：60 seconds  
.Sensor type：electrochemical CO sensor  
.Buzzer alarm setup  
.Set up and review the upper and lower alarm limit  
.MAX、AVG、data hold  
.Auto power off  
.Low battery indication  
.Operating environment：0~50℃；10~90%RH  
.Storage environment：-10~80℃；10~75%RH  
.2*1.5V AAA batteries.