<p>It can detect altitude and atmospheric pressure, and adopts a sensitive non-liquid barometer that can distinguish small changes in atmospheric pressure Sensitivity photosensitive element, which can achieve fast sampling and ensure accurate light intensity detection. Equipped with a built-in water pressure gauge component, it can reflect real-time changes in atmospheric pressure. Adopting a backlight screen design, the environmental parameter values are displayed in real-time and clearly, Automatically shut down after 5 to 15 minutes of inactivity, balancing practicality and energy efficiency. Simple to operate, convenient to use, accurate and safe measuring equipment, suitable for various environmental inspections. Built in rechargeable lithium battery: Equipped with a 400mA lithium battery and a TYPE-C convenient charging interface, it achieves an organic combination of low power consumption and high performance, ensuring long-lasting battery life of the device Display: LCD screen Power supply: built-in 3.7V 400mA lithium battery Working height: maximum 2000 meters Noise: 30-130dBA\/C, \u00B1 5dB Pressure: 300-1200hpa, \u00B1 20hpa Illumination: 0-199999 lux, \u00B1 5%; 0-199.99fc, \u00B1 5 Humidity measurement: 10-99%, \u00B1 3% RH Temperature measurement: -20 \u2103 to 60 \u2103\/-4 \u2109 to 140 \u2109, \u00B1 2 \u2103\/\u00B1 2 \u2109 Colour:Green Material:ABS Package Contents: 1 x Environmental noise detector 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.</p>