Features: Accurately measure and levels (0 9990ppm/0 9999us/cm) with built in temperature (0 60℃/32 140℉), ideal for testing drinking water purity and detecting in household/aquarium environments. This water quality testing pen combines user friendly integrated design with touch measurement, HOLD function for result retention, and replaceable 3V coin battery for extended outdoor/indoor use. Essential for families, aquarium enthusiasts, hydroponic gardeners, and travelers requiring dependable water analysis in homes, labs, or remote locations. Perfect for daily checks of tap water safety, pool maintenance, water systems, and agricultural irrigation monitoring with its slip resistant ergonomic grip. Engineered with ABS housing and anti slip texture, this portable meter delivers laboratory grade in pocket sized convenience for quick water assessments . Specifications: Stuff: ABS case Size: 154x30x14mm Measurement : 0-9990ppm/0-9999us/cm; 0-60℃/32-140℉ Working temperature: 0-60℃ Package Includes: & Water Quality Test Pen note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.