Features:??7in1 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 test data 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.2. Due to the price limit of transportation conditions, the product is shipped without calibration fluid.