User-friendly Operation: Simply insert 2 1.5V AAA batteries into the compartment, ensuring correct polarity (positive and negative). No charging required, providing hassle-free functionality.Smart Remote Monitoring: Stay connected with the wireless thermometer hygrometer's Wi-Fi support, enabling remote monitoring and access to temperature and humidity graphs from anywhere via the Osprey Smart Home APP. Set custom ranges, and receive instant notifications if the temperature or humidity levels exceed your specified thresholds, empowering you to promptly address changes in air quality.Two-in-One Functionality: Mini digital thermometer hygrometer with built-in probe, serving as an electronic thermometer and hygrometer for indoor temperature and humidity measurement. Temperature measurement range: -10 to +60/14 to 140; humidity measurement range: 0 to 100%RH. Accurate readings with temperature measurement accuracy of 2 and humidity measurement accuracy of 5%RH.Convenient Design: With its stand and hole, this indoor hygrometer offers versatile placement options - hang it on the wall or position it anywhere you desire. The large digits on the LCD display ensure easy readability, while the battery volume indicator provides clear visibility of power levels. Plus, the comfort level indicators (expressed with smile/sad face emojis) make it easier to understand the healthy level of humidity and temperature in the environmentOsprey Smart Home App Integration: Exclusively compatible with the Osprey Smart Home App, enabling intelligent linking to temperature regulation or humidifier devices for automated adjustments based on real-time temperature and humidity readings.