Features: This PH meter is highly efficient and accurate due to its advanced microprocessor technology. Big LCD display screen which has great waterproof performance and let you easily read the displayed value. This digital pen style PH meter is an ideal instrument for whatever you may need to test the PH levels. With compact portable design. Easy to Use, you just remove the protective cap and immerse the PH meter electrode in the solution and turn on the PH by "ON / OFF" switch to be measured. Description: This digital pen style pH meter is an good instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Very excellent, accurate and durable. Fast and Accurate: Ensure Your Pool, General Hydroponics Ph or Even Drinking Water Has a Perfect Ph Balance and Safe for Use with Tester Precision Ph Accuracy. Tester Has a Sensitive Electrode Sensor to Read Accurate Ph Levels. Specification: Color: yellow Test range: ph: 0.1-14.00; : 0-55 Accuracy: 0.1PH Resolution: 0.1PH Automatic temperature compensation:0-50 (0-122 ) Operating temperature: 0-50 (0-122 ) Battery: 4*1.5V Size: 152*30*15mm Package included: 1 x Digital PH Meter Tester Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please allow slight deviation due to manual measurement. Thank you