Features: 2-in-1 pH and temperature tester With ATC (Automatic Temperature Compensation) Clear & dual measurement displays With backlight Switchable temperature unit (°C/°F) 1-point manual calibration BNC type replaceable ph electrode Powered by button batteries or power adaptor Specifications: Measuring Range: pH 0.00~14.00pH Temperature: 0~55°C (32~131°F) Resolution: pH: 0.01pH Temperature: 0.1°C Accuracy: pH: ±0.1pH Temperature: ±1°C ATC: 0~50°C (32~122°F) Environmental Condition: 0~50°C (32~122°F); Humidity ≤95% Power Supply: 6V DC or 4 x 1.5V AG13 button battery Size: 60 x 55 x 23mm Weight: 75 Set Includes: 1 x pH/Temp Meter 1 x Removable BNC pH Electrode 1 x Fixed Temperature Probe 1 x 4.01 pH Buffer Powder 1 x 6.86 pH Buffer Powder 1 x 9.18 pH Buffer Powder 1 x Mini Screw Driver 1 x Clip Holder 1 x Rubber holder with suction cap 4 x 1.5V AG13 button battery 1 x Power adaptor English User Manual Sturdy Carrying Case