Measures the moisture in a material 7 Selectable material types Backlight for low light use Auto power off can be override Hold mode Low battery indicator Specifications Sensor Electrical Resistance Accuracyplusmn 1 at 23plusmn 5deg C Temperature Coefficient 10 per deg C out of 23plusmn 5deg C Resolution 0.1 Measuring Rate 1 measurementsecond Operation Environment 0 to 60deg C & Relative Humidity 70 Battery 2x AAA Supplied Battery Life 250 hours typical with alkaline battery Dimensions 25x 51x 133mm Hx Wx T Weight Approx 117g including batteries