Features: Large LCD screen displays the PH value, easy to read in seconds. Equipped with screw joint extended composite electrode, suitable for direct measurement in small diameter container. High precision and fast response PH meter, easy to use. Compact and lightweight design, convenient to carry. Suitable for aquariums, aquaculture, hatchery, food processing, laboratories, paper industry, swimming pools and school use. Specification: Model: PH-98103 Measure range: 0.00~14.00PH Accuracy: ±0.2PH, ±0.1PH (20℃) Resolution: 0.01PH Working temperature: 0~50℃ Automatic temperature compensation: 0~50℃ Supporting electrode: E-201, E-201B, SP300, SP300S Battery: 3 * 1.5V AG13 (Not included ) Weight: Approx.116g/ 4.1oz Size: Approx.175*51*25mm/ 6.9*2*1in Package List: 1 * PH Meter 1 * Screwdriver 1 * User manual Note: Please allow slight error due to manual measurement. Thanks for your understanding.