Specifications: Resolution to 0.10 mS/cm Accuracy: +- 1% Full Scale Calibration standard Range: 2.00 to 19.90 mS/cm Calibration: 1 point ATC: 0 to 50 ° C Temperature coefficient: 2% per ° C Normalization temperature: 25 ° C Auto off: 8,5 mins. after last keypress Operating temperature: 0 to 50 ° C Power battery: 4 x 1.5 V LCD displa (21x27 mm) Dimensions WxDxH cm: 3,8x16,5x3 cm Weight kg: 90 g