Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to contact us within 12 hours after placing the order. Our product description: Product Features: Pen type conductivity(EC) water quality analyzer, lightweight and portable. The simple designed EC meter is easy to operate, and measure water quality within seconds. With highly efficient and accurate, the EC meter has measuring range of 0~1999us/cm and +/- 2%F.S accuracy. Easy to calibrate with a small screwdriver. High precision LCD displays the measurement result clearly. Apply in food & beverage, water treatment, environment analysis and other industries. Specifications: Product material: ABS Range: LOW: 0~1999us/cm; HI: 0~19.99ms/cm Resolution: LOW: 1us/cm; HI: 0.01ms/cm Accuracy: ±2%F.S Power Supply: 4 * 1.5V LR44 button battery (NOT included) Temperature Compensation: 0~50°C Operating Temperature: 0~50°C Item Size: 165 * 50 * 28mm / 6.49 * 1.97 * 1.10in Item Weight: 57g / 2.01oz Package Weight: 136g / 4.80oz Package Size: 25 * 10.5 * 5cm / 9.84 * 4.13 * 1.97in Package List: 1 * EC Meter 1 * Slotted Screwdriver 1 * Manual (English) Note: Because the model and display effect of the monitor may be different, there may be slight differences in color, and the size is manually measured, there may be an error of 1-2cm, please understand.