Features: It has small size and low weight as a pen, it is easy to be carried, It is convenient for you to take it in your pocket when you go out. It has the resolution of 0.1PH, fast to get the testing and can test the PH value for any 0-14PH liquid. You can get the accurate water PH testing without taking care about the influence of water temperature. This PH meter is great for a wide of tasks, such as swimming pool, tap water, home brewing. Specifications: Material: Color: Yellow & White Size:15*3*1.5cm Operating Temperature: 0°C - 50°C / 32°F - 122°F Measure : 0.00- 14.00PH Resolution: 0.1PH Accuracy: ±0.01PH Power Supply: 2*1.5V Batteries (Not Included) Net Weight: 51g Gross Weight: 100g Package Size: 10*10*5cm Package List: 1*Digital PH Meter 2*Calibration Packets 1*Carrying Case 1*User Manual 1*Screwdriver