A well-made, well-designed gadget. It gives temperature and relative humidity at four locations around the home. The base unit receives data from the three remote sensors so that you can see the conditions from the convenience of one location. You can set the base unit to centigrade or Fahrenheit and there is a large convenient button that switches the backlight on the display for several seconds in low-light conditions.
Great little thermometer - a little inaccurate accross the range of 3 sensors by a full degree.ie + - 0.5 degree above and below the mid point.
Range I have tried at 30 meters so very pleased.