KL-013 High Accuracy Portable pH Meter Technical Specification: Measuring range:PH:0.00~14.00PH mV:0~+/-1999mV Temp:0~100℃ Accuracy:PH:+/-0.01pH mV:+/-0.1℅F稴+/-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:9V Battery Input Impedance:1012Ω Dimensions:180x83x46(mm3) Weight:290g