Detailed offer Description Model KL-013M Measuring range PH 0.00~14.00PH mV 0~±1999mV Temp 0~100℃ Accuracy PH ±0.01pH mV ±0.1℅F·S±1digit Temp ±0.4℃ Resolution PH 0.01pH mV 1mV Temp 0.1℃ Environment Temperature:0℃~50℃ Humidity:≤95℅ Display 4-digital LCD Power Supply 1×9V Battery Input Impedance 1012Ω Dimensions 123mm×72mm×33mm Weight 238g if you have any question about the products, don't hesitate to contact us. We are willing to try our best to make full answer to you, even if you are not our regular customers. Always, we are waiting for your question.