Economical price and an easy-to-read display! Waterproof, dustproof housings float Easy to use; push-button calibration with auto buffer recognition Low-cost pocket sized meter is perfect for less demanding applications Includes transparent electrode cover / sample cup Push-button calibration, HOLD function, and error messagesOAKTON's new EcoTestr is economical and easy to use. With its crystal clear, ergonomically designed display, you can easily view measurements at a glance.Each rugged tester has waterproof and dustproof housing for use in dirty and damp field conditions. Simply dip and read-the orientation of the display means there's no need to turn your head or tilt the testerSingle-junction electrode is well-suited for general purpose applications. Recessed bulb with bulb guard protects against breakageUp to three point calibration with auto-buffer recognition for quick calibrations. Automatic temperature compensation for accurate readings under changing conditions. Hold function locks in measured value. Auto-off function preserves batteries.Specifications Range: 0.0 to 14.0 pHResolution: 0.1 pHAccuracy: 0.1 pHTemperature compensation: automaticCalibration: up to three pointBuffer recognition: 4.0, 7.0, or 10.0Display: three-digit vertical LCDPower: four 1.5 V button cell batteries (included)Battery life: >300 hours