This pH monitor allows you to replace electrode once electrode is accidentally damaged and lets you mount the pH monitor to your tank or aquarium with the included adjustable mounting bracket and suction cup to hold the electrode in place. Use it to monitor the pH level of any type of water digitally, may it be an aquarium, swimming pool, spa, laboratories, hospitals, hydroponic purposes and other applications that needed accurate pH measuring and monitoring. Features: Replaceable BNC Electrode with 1 Meter (3.28 feet) cable Adjustable Mounting Bracket With Automatic Temperature Compensation (ATC) Large LCD Display Pre-calibrated at factory With CE and RoHS approval Easy calibration of pH Lightweight and compact Batteries are included Specifications: Measuring Range : 0.00 ~ 14.00 pH Resolution : 0.01 pH Accuracy : ±0.1 pH Automatic Temperature Compensation (ATC) : 0 ~ 50°C (32 ~ 122°F) Operating Temperature : 0 ~ 50 °C (32 ~ 122 °F) Batteries : 4 x 1.5 V (AG13 Button Battery) Size : approx. 60 x 55 ) x 23mm (2.36' x 2.17' x 0.91' inch) Weight : approx. 113g Set Includes: 1 x pH monitor 1 x BNC Replaceable Electrode 1 x Protective cap for electrode 1 x Suction cap 3 x Calibration Powder (pH 4.01 / pH 6.86 / pH 9.18) 4 x AG13 Button Battery 1 x Mini Screwdriver 1 x English Instruction Manual Standard factory package