Feature:1. Auto calibration function.2. Screen brightness can be adjusted by hand.3. Different colors and expressions face show the quality of the environment, very realistic.4. You can put it on the table or hung it on the wall.5. Large screen for easy reading.6. Large capacity battery for long service time.Specification:This product is a decibel meter that detects noise, temperature and humidity, it combines sensors real-time monitoring of decibel, temperature, and humidity on its display.Features:Auto calibration function.Screen brightness can be adjusted by hand.Different colors and expressions face show the quality of the environment, very realistic.You can put it on the table or hung it on the wall.Large screen for easy reading.Large capacity battery for long service time.Specifications:Color: whiteMaterial: ABSMeasuring range: 30-130dBDetection temperature: -10°C to 50°CRelative humidity: 20% to 85%Battery: 3.7V, 2000mAhItem size: 270 * 90 * 30mm / 10.6 * 3.5 * 1.2inItem weight: 268g / 9.5ouncePackage size: 330 * 100 * 45mm / 13.0 * 3.9 * 1.8inPackage weight: 550g / 1.2lbPacking List:1 * Decibel Meter1 * User Manual1 * USB Cable1 * Set of Installation ToolsPackage List:1 * Decibel Meter1 * User Manual1 * USB Cable1 * Set of Installation Tools