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Digital Thermometer Hygrometer with External NTC Thermistor Sensor Clock etc. Digital Hygrometer Thermometer LCD Display with Sensor:USEFUL FOR: Showing temperature and relative humidity at any office or living space. Built in clock. Features: Little cute hygrometer/thermometer w/ lot of functions!Clear LCD display, easy to read;Built-in humidity sensor and external temperature sensor with 10 ft wire.Display humidity and temperatures; Internal memories for max and min temperature and humidity.Switch between C and F for temperature.Calendar, clock, and alarm clock function.external temperature sensor with 60-inch insulated wire.One button for display mode; Free standing or wall mountable. Technical Parameters: Temperature range: -5 to 70 °C;External NTC sensor on 10 ft wire;Humidity: 30% to 90%Accuracy: +/- 1 °C; or 1% RH.Resolution: 0.1;Power Supply: one common button battery(size LR44);Operating Ambient Temp: -5 to 50 °C;Physical Size: 103×44×15mm;Display Size: 35×24mm.