Ideal for aquarium, aquaculture, pool, school laboratory, food processing, pure water production... * Measuring PH range: 0.0 - 14.0 PH; resolution: 0.1 PH; accuracy:+/- 0.1 pH (20 C), +/- 0.2 pH * Work Temperature:0-50 C (32-122 F); relative humidity: less than 95%; one point calibration-manually * With plastic case, calibration solution, screwdriver; excellent, accurate and durable PH meter * Package Content: 1 x PH Meter, 1 x Screw Driver, 3 x Button Cell Batteries, 1 x Instruction Manual