Lightweight body, testing in hand: This CD4 multi-parameter measuring instrument has a light body, easy to grasp with one hand, high-strength ABS shell, and comfortable hand feeling. Three-proof design, safe, reliable, and anti-falling: strong sealing, not afraid of rain, more solid and resistant,Used, high-quality materials cast the advantages of toughness, wear resistance and fall resistance. Chinese and English switching, simple operation: three buttons, powerful, 2.0" LCD liquid crystal display, resolution 320*240 high-definition interface display, clear and comfortable. Chinese and English bilingual settings, multi-country common. Data can be imported into a computer: 500 sets of data can be stored and connected to a computer for data analysis. Quadruple alarm: Ultra-high decibel buzzer, vibration reminder, three lights flashing, and interface data color change reminder. Real-time curve analysis, simple and clear, high and low double alarm values can be set by themselves.