Model: B5109 Keep your pool perfect with GoveeLife Smart Pool Thermometer! Enjoy accurate temperature readings, real-time updates, and smart app alerts. With a 100m range, 3-year battery life, and Alexa compatibility, pool maintenance has never been easier. IPX7 Waterproof Design: Durability meets reliability. GoveeLife Smart Pool Thermometer is built to withstand splashes and submersion in all weather conditions. Ultimate Accuracy: Detect temperatures ranging from -4°F to 158°F (-20°C to 70°C), can accurately detect the temperature change of ± 0.9°F, refresh speed up to 2S, and can switch °F/°C. Smart Monitoring Any Time: With an impressive 100m communication range, the floating sensor and Wi-Fi Gateway will always keep connected! Smart Home Compatibility: With Alexa, Google Assistant, and Govee Home, discover easy pool management with your current smart home setup. Long-Lasting: Dual-mode pool thermometer powered by 2 AAA batteries. Standard mode lasts 1 year, and power saving mode 3 years. Real-Time Temperature Notification: Receive instant notifications through our app, and customize notification settings to keep your pool safe and inviting. *To connect the App for smart remote monitoring, please must purchase a Wi-Fi gateway+sensors version, wifi gateway is not sold alone. The floating sensor H5109 is sold separately for users who bought a pool thermometer with a gateway and subsequently need a single sensor.*It is better not to have obstacles between the gateway and the sub-device, otherwise it may affect the stability of signal transmission.*You can only bind one device to one account. Data sharing is not available in this product.