Feature: 1. Seven parameter functions are integrated, and PH, TEPM, RH, EC, CF, TDS, MV can be measured on one instrument at the same time. 2. Made of high quality ABS, light weight, durable, it can be vertical or wall mounted design, easy to install and use 3. NiMH battery power supply, long working time, simple operation to replace the battery, convenient for daily use 4. Simple operation, high measurement accuracy, clear image on the large LCD screen, convenient for reading and recording 5. Simple appearance design, equipped with tool box, easy to carry, suitable for water quality testing Specification: Item Type: Water Quality Meter.Model: PH-951 Material: ABSWeight: Approx. 1130g / 39.86oz Power supply: 1 x 1.2V 200mAh Ni MH battery(battery included)Purpose: water quality analysis Measuring Range PH: 0.00~14.00pH CF: 0.0~199.9CF TDS: 10~19990ppm RH: 10%RH-99%RH EC: 0.00~19.99EC ORP:-1999~1999mV Temperature：0℃~50℃C Resolution EC: 0.01EC CF: 0.1CF TDS: 10 ppm PH: 0.01PH ORP:1mV Temperature：0.1℃(0.20F) RH: 1%RH Accuracy PH: ±0.1 PH EC、 CF, TDS: ±2%F.S RH: ±5%RH ORP:0.1%F.S±ldigit Package List: 1 x Water Quality Meter(battery included)2 x Sensor Stick1 x Power Adapter3 x Suction Cup1 x Bracket1 x Screwdriver1 x Manual1 x Tool Box Note: If you find abnormal phenomena such as large measurement deviation, flickering measurement value, no zero reset, etc., please soak the electrode in ethanol to clean it