Indicator: Hygrometer has and text alerts. Display different prompts according to changes in indoor temperature and humidity. It records the highest and lowest humidity and temperature indicators for a 24-hour period. Clear LCD Display: The digital thermometer adopts LCD screen, which is designed with a backlight function, making it easier to read data in dark conditions. Designed with a / switch button, you can switch between Celsius or Fahrenheit at will. Multi-Scenario Use: The digital hygrometer ensures proper temperature and humidity control, can be placed in bedrooms, baby rooms, kitchens, cellars, offices, wine cellars, conservatories and living rooms. Multiple installation methods: The indoor thermometer adopts magnet adsorption, desktop vertical and wall-mounted . You can easily place this hygrometer in different . Measuring range Indoor temperature range: 14F~122 (-10~50) Outdoor temperature range: -40F~158F (-40C~70C) Temperature resolution: 0.1C/F 20%~95% Humidity resolution: 1% humidity range Temperature display unit: /F optional (default is F) Wireless range: 328ft/100m depending on availability Wireless frequency: 433 MHz power supply: Receiver: Polymer rechargeable battery Capacity: 1800mAh Transmitter: 2 AAA batteries (1.5V) (batteries not included) Material: ABS colour: Black Package Contents: 1 x Receiver 1 x Transmitter 1 x USB Cable 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.