Measurement Range: 0.0-14.0PH Power: 3*1.5v Usage environment: 0-50 degree RHApplication: Freshwater and SaltwaterPrecision: 0.1pHResolution: 0.1 pHSize: 152*29*15mmColor:Yellow/Red ( Send In Random)Material: Electronic originals + plastic shellThis digital pen style pH meter is an ideal instrument for aquarium、 fishing industry、 swimming pool、school laboratory、 food & beverage etc. Very excellent、 accurate and durable.Package Included:1 x Digital pH meter1 x Calibration Adjustment Screwdriver3 x Batteries Included in pH Meter1 x User instruction (English)