Features:  Large Display Screen with Backlight: This sensors adopt a 2.9inch large LCD display screen and the backlight can be closed at night, which can let you see the data more clearly and it will not disturb your sleep at night.  APP Remotes Monitoring: After connecting the Tuya APP, you can check the data on your mbilephone easily, even if you are far away from home.  This temperature and humidity detector allows you to better understand the current temperature and humidity, allowing you to make adjustments in time based on the data.  Alarm Setting: This sensors support you to set the upper and lower limit alarm on your mobilephone APP.  Temperature Units Switching: You can change the ℃/℉ temperature units according to your needs.  Time&Date Display: This sensors can not only detect the humidity and temperature for you, but also display the time and date.  Two Power Supplys Ways: Support USB power supplys and bulit-in battery power supplys two ways, which makes this detector can be used normal after power failure.    Specifications:  Material: ABS  Battery: 1 * lithium battery, 500mAh (included)  Item size: 86 * 22.8mm / 3.4 * 0.9in  Package size: 100 * 100 * 31mm / 3.9 * 3.9 * 1.2in  Package weight: 80g / 2.8ounce    Packing list:  1 * Temperature Humidity Sensors