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 day Temperature error 1 or less, transmission distance 60m Indoor and outdoor temperature display: / optional Indoor host temperature detection range: -9.9~+50 (14.2~122) Pool sensor temperature detection range: -40~+70 (-40~158) Time display: 12/24H optional host size: 9 x 6 x 2.2cm outdoor unit size: 8 x 13.3cm Material: plastic colour: white Package 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 lanyard 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.