Item No.: C99AO111
.Test range:  PH：0.00-14.00pH                 
                    ORP：-1999~1999mV                
                   Temperature:   -50°C~70°C                
.Resolution:  PH：0.01pH，ORP: 1mV，Temperature: 0.1°C                
.Accuracy:    PH：±0.1pH，ORP: ±5mV   Temperature: ±1°C                
.Working temperature：0℃～50℃                
.Automatic Temperature Compensation:  0°-50°C                
.Batteries: 4x1.5V （AG13）