Long Battery LifeWith the low power consumption E Ink display and Thread / Bluetooth Low Energy technology, the temperature and humidity meter has 8 months of battery life in normal indoor environments (data provided by lab). * When you put the supplied battery into the battery compartment, if the display shows low battery, please take it out and let it sit for 2 hours, then retry it. Any issue please contact us and we will reply to you as early as possible.Works with Apple HomeCheck the data via Home app on your iPhone. With an Apple home hub device, you can access the data remotely or set automation (the iPhone needs to be upgraded to iOS 15.1 or later, and the hub should be upgraded to the latest version). With + app, you can export the latest 30-day data. The device will transmit the latest data to the hub or the phone every 10 minutes. ATTENTION: this product does not work with + app on Android phones, only on iPhones.Supports Thread and BluetoothTo use Thread connection, you need to set up a Thread-enabled home hub, such as HomePod mini or Apple TV 4K (2nd generation or 3rd generation with an Ethernet port), or a supported third-party border router.Accurate MeasurementsThe built-in Swiss-made sensor responds with accurate real-time measurements. The measurement range is 32 ~ 122F (0 ~ 50 C) for temperature and 0 ~ 99.9%RH (non-condensation environment) for humidity. Press the back button to switch Fahrenheit/Celsius. Please do not place this product in environment with humidity >90% for long term use. * To get accurate readings, after you receive the product, place it in the room for at least 20 minutes and then check the readings.E Ink DisplayReadings on the display are so clear, just like printed characters on real paper. So you can know the temperature and humidity at a glance, from different angles in the room.