Features: 1. Made of high quality material, durable in use. 2. Lightweight and mini size, portable to carry. 3. 4 in 1 function, can be used to test pH, TDS, EC and TEMP of water. 4. Easy to operate and read the digits, convenient to use. 5. Suitable for water sources, hydroponics, swimming pools and other water systems. Specification: Condition: 100 percent Brand New Material: ABS Range: pH: 0.00 to 14.00pH EC: 1 to 19999us or cm TDS: 1 to 19999ppm 0 to 60.0℃ or 32.0 to 140.0℉ Resolution: pH: 0.01pH EC: 1us or cm TDS: 1ppm Accuracy ( 25℃ or 77℉): pH: ±0.05pH TEMP: ±0.5℃ EC: ±2 percent TDS: ±2 percent Calibration: pH 6.86 point: Accuracy ±0.1pH 6.86 or 4.00(6.86 or 9.18) points: Accuracy ±0.05pH 6.86 or 4.00 or 9.18 points: Accuracy ±0.02pH EC Calibrated by factory (1413μs or cm) TDS Calibrated by factory (1413μs or cm) Temp. Compensation: Automatic temperature compensation (0-60℃) Battery or Auto power-off: 3 x 1.5V button cell (Not Included) Battery Type: AG13 or LR44 Auto power-off: 5 Minutes Low power protection system or battery indicator Environment: 0 to 60.0℃ (32.0 to 140.0℉) RH 100 percent Size: Approx. 7.2 x 1.47 in Weight: Approx. 164g or 5.8 oz Package list: 1 x Water Quality Tester (Battery Not Included) Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 4. The product is shipped without powder. 1,Made of high quality material, durable in use 2,Lightweight and mini size, portable to carry 3,4 in 1 function, can be used to test pH, TDS, EC and TEMP of water 4,Easy to operate and read the digits, convenient to use 5,Suitable for water sources, hydroponics, swimming pools and other water systems Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.