Waterproof EcoTestr pH 1

Economical, pocket-sized meter 
Waterproof, dust proof housing that floats 
Easy to use; push-button calibration with auto buffer recognition 
Includes transparent electrode cover / sample cup 
Push-button calibration, HOLD function, and error messages 
Range: 0.0 to 14.0 pH 
Power: four 1.5 V button cell batteries (included)