Description: This PH Meters is Waterproof and Available for wide applications, such as aquarium, beverage, fish hatcheries, food processing, photography, laboratory, quality control, school & colleges, swimming pools, water conditions. Feature: measuring range:0~14 ph accuracy +/-0.02 ph Three point Calibration:4.01, 6.86, 9.18 Working temperature range:0~50 Celsius Degree (32~122 Fahrenheit) 1.5V *4 Button cell battery Dimension 188*38mm Including External Electrode; Weight 82g Package Includes: -1 x pH Meter -1 x External Electrode with 0.8m Length Cord (BNC Interface) -1 x Carry Case -3 x Calibration Packet -4 x button cell (1.5V) -1 x Manual