[Quadruple Waterproof Protection]Upgraded thickened sealing ring + anti-corrosion shell + desiccant + waterproof internal hardware ensures that the wireless pool thermometer remains sealed during use, preventing internal soaking and rusting. Power supply method: Battery: 2x1.5V AAA size alkaline battery (not included) [328 Feet Long Stable Transmission]The swimming pool thermometer adopts enhanced antenna technology, which improves the stability of the connection between the swimming pool thermometer and the indoor station. [High-Precision Water Temperature Measurement] This smart swimming pool thermometer uses imported chips and contact measurement methods to ensure the accuracy of water temperature measurement. Additionally, it's very responsive, updating the water temperature approximately every 30 seconds. [IP67 Waterproof]The swimming pool thermometer is IP67 waterproof and works well in rain and snow. If there are any quality issues, please contact us. We will solve it for you immediately. [Multi-functional water temperature measurement in different environments] This pool thermometer has a display screen and can detect the water temperature in swimming pools, bathtubs, fish tanks, saunas, breeding ponds and other places. In addition, it can monitor indoor temperature and humidity and has a clock function, making it versatile and easy to set up. Material: plastic colour: As shown Package Contents: 1 x Host 1 x Swimming pool temperature outdoor unit 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.