Include a rope to prevent the thermometer from floating. The pond thermometer is made of durable materials and shatterproof, so you can use it for a long time. Temperature reading range: 20 to 110 degrees Fahrenheit/-10 to 50 degrees Celsius Suitable for paddling pool, swimming pool, hot tub, baby swimming pool, fish pond, , spa and aquarium. This is not a toy, please keep from children. With accurate temperature readings, there is no need to . Colour:White & Red Material:ABS+PVC+PP Package Contents: 1 * thermometer 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.