Features: Delicate & pen-type design Easy to use and provides a quick measurement Wide range 0 ~ 1999 ppm (mg/L) for various applications High accuracy of +- 2% full scale Large and clear LCD display with backlight Built with Automatic Temperature Compensation (ATC) Backlight display Specifications: Measuring Range: pH: 0.00 ~ 14.00 PH Water Temperature: 0 ~ 50 C EC: 0.00 ~ 19.99EC CF: 0.0 ~ 199.9CF TDS: 10 ~ 9990ppm Resolution: pH: 0.01 PH Water Temperature: 0.1 C EC: 0.01EC CF: 0.1CF TDS: 10ppm Accuracy: pH: +-0.1 PH Temperature: +-1 C EC, CF, TDS: +-2% F.S Automatic Temperature Compensation (ATC): 0 - 50 C Operating Temperature: 0 - 50 C Rechargeable Battery: DC 6V lithium battery (built-in) Dimensions: approx. 152(L) x 80 (W) x 26(D) mm Weight: approx.265g