Feature:1. DURABLE LED SCREEN: With HD LED large screen, the reading is clear and no ghosting, using strong tempered glass, has good mechanical and thermal shock resistance.2. BACKLIGHT FUNCTION: The monitor has intelligent backlight function, with intelligent brightness display, which can protect eyes from direct exposure to strong light.3. RELIABLE OPERATION: The hygrometer thermometer has ventilation holes, external sound and light alarm, accurate in measurement, safe and reliable in operation.4. MEASURING RANGE: The measurement temperature range is -40-80, and the humidity range is 0-99%RH, with physical button for easy operation and reading.5. WIDE APPLICATION: With high accuracy and resolution, this temperature humidity monitor is ideal for home, factory floor, laboratory, grow sheds, etc.Specification:Item Type: Temperature Humidity Meter(External 5V sound and light alarm)Probe Specification: Approx. 1 meter / 3.3ftPower Cord Length: Approx. 1.5 meter / 4.9ftMeasurement Accuracy: 0.3 2%RHMeasuring Range: Temperature: -40~80Humidity: 0~99%RHSupply Voltage: 5V1AResolution: 0.1, 0.1%RHPlug Type: US Plug 100-240V.Package List:1 x Temperature Humidity Meter1 x Charging Head1 x Charging Cable1 x Expansion Screw