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 / 3.3ft Power Cord Length: Approx. 1.5 meter / 4.9ft Measurement Accuracy: ±0.3℃ ±2%RH Measuring Range: Temperature: -40~80℃ Humidity: 0~99%RH Supply Voltage: 5V1A Resolution: 0.1℃, 0.1%RH Plug Type: US Plug 100-240V. Package List: 1 x Temperature Humidity Meter1 x Charging Head1 x Charging Cable1 x Expansion Screw