Features： 1、Removable Electrode: The water quality monitor is equipped with removable electrode, and one electrode can measure 7 values, PH, ORP, EC, PPM, CF, humidity, temperature. 2、Wifi Function: Wifi connection, stable data transmission, downloading applications to view current and historical data anomalies, high and low data alarms on mobile phones, etc. 3、For Tuya APP: The for Tuya application program can view in real time, record data for a long time, facilitate comparison and analysis, and develop solutions. 4、 ABS: This meter is made of ABS that is durable but please note that it is not waterproof. Please do not let the tester get water or damp during use, otherwise the tester may not work normally. 5、Applications: This water quality tester is applicable to aquaculture, aquarium, fish pond, hydroponics, drinking water, laboratory, water treatment. Specification： Item Type: Water Quality Monitor Material: ABS Gross Weight: 608g/21.4oz Range: EC:0.00-19.99mS/cm, 20.1-200.0mS/cm Total Dissolved Solids: 0-9990ppm, 10.1-100.0ppt CF: 0.1-199.9CF PH Value: 0.01-14.00pH ORP:-1200mV-+1200mV Air Humidity: 10percenst RH-99percenst RH Temperature: 0.1℃-60.0℃, 32.1℉-140.0℉ Calibration: EC TDS: 1413pS/cm, 12.88mS/cm, 111.8mS/cm PH Value: 6.86/4.00/9.18 or 7.00/4.00/10.01 RS485 3178: With 485 module Function: Supporting for Tuya APP WiFi function Multi Parameter Seven in One Measurement: PH value, conductivity, TDS, humidity, CF, temperature; Automatic calibration is supported. Applications: Aquaculture, aquarium, fish pond, hydroponics, drinking water, laboratory, water treatment. Package List： 1 xWater Quality Monitor 1 x Electrode 1 x Power Plug 5 x Test Powder Pack 1 x Instruction Manual 2 x Suction Cup 1 x Support