This is a premium ORP Meter Tester. Pen type ORP tester, compact and portable carry. Made of plastic material, it is lightweight, sturdy and . Suitable for testing drinking water, water conditioning, reverse osmosis, cooling towers, waste water, laboratories, agriculture, etc. Feature - Color: White. - Material: Plastic. - Size: 18.8x3.5x3.5cm. - Range: 0~ + / - 1999mg/LmV. - Resolution Resolution: 1mV. - Accuracy: 5mV. - Battery: 4* 1.5v ( -13 Battery not include). - Operating Temperature: 0 degree centigrade to 50 degree centigrade. - Calibration: Calibration. - Made of plastic material, it is lightweight, sturdy and . - Pen type ORP tester, compact and portable carry. - LCD digital ORP tester, for daily read, , fast and accurate. - Suitable for testing drinking water, water conditioning, reverse osmosis, cooling towers, waste water, laboratories, agriculture, etc. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x ORP Meter Tester