2-in-1 ORP Meter Temperature Redox Thermometer Water Quality Tester Range : mV : 0~1999mV / Temperature : -50C-70C (-58F-158F) Resolution : mV : 1mV / Temperature : 0.1C (0.2F) Accuracy : mV : 5mV / Temperature : 1C(2F) Dimensions: 188mm x 35mm x 35mm 2-in-1 ORP & Temperature (C/ F)