Features: The real-time temperature of the water where the sensor is located and the real-time temperature of the room where the main unit is located can be displayed on the same screen.Support the highest temperature and lowest temperature record of the dayTemperature error 1 or less, transmission distance 60mIndoor and outdoor temperature display: / optionalIndoor host temperature detection range: -9.9~+50 (14.2~122)Pool sensor temperature detection range: -40~+70 (-40~158)Time display: 12/24H optionalhost size: 9 x 6 x 2.2cmoutdoor unit size: 8 x 13.3cmMaterial: plasticcolour: whitePackage Contents: 1 x host (Need 2 x AAA batteries no include)1 x pool temperature outdoor unit (Need 2 x AAA batteries no include)1 x outdoor unit pool lanyardOnly 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.