[ Chlorin Meter]: Multifunctional water quality tester for measuring pH, salinity, ORP, chlorin, EC, Total Dissolved Solids, and temperature in swimming pools. Supports 7 simultaneous measurements to save time and labor. [Mobilephone APP Control]: Mobilephone APP control for remote data transmission, allowing you to store, manage and share your on APP, and with data export function, which is a useful tool for your pool management. Support viewing historical data month, week, day at whenever and wherever you want. [Device Sharing]: Equipped with multi-account management and multi-device management function. Support name customization and automatic temperature compensation function. [Alarm Function]: The highest or lowest measurement threshold can be set according to your needs, APP alerts you when the detection value exceeds the set value. [USB & Solar Powered Design] : Two charging modes design, supports both solar and USB charging, no need to worry about running out of power, lower power consumption and longer durability. [Waterproof Design]: PH meter can be placed directly in the pool and floats on the water, so you know the water quality change first time. IP67 waterproof design, suitable for short-term immersion in the pool. [Wide Applications]: Suitable for swimming pools, aquaculture, fish tanks, modern agriculture, wastewater treating, river water quality testing, etc. Notes: 1. This product needs to be used with ZigBee gateways that support the tuya solution. 2. Due to the price limit of transportation conditions, the product is shipped without calibration fluid. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Colour:Photo Color Material:Plastic Package Contents: 1x Water Tester set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.