Brand NEW Humidity Meter Room Thermometer Solar-Powered Hygrometer Indoor Digital Temperature Sensor Monitor 2.2'' Humidity Gauge for Baby Rooms, Home, Office 3Pack These indoor thermometers are powered by solar energy. In bright environments, solar panels can provide continuous energy, whether it's from lights or sunlight! Designed with a curved shape and a three-sided ventilation system, this hygrometer detects even the smallest air changes, ensuring more accurate and more dependable readings. The indoor humidity monitor automatically Rapid updates every 10 seconds, ensuring you always receive the most current and accurate information. (Accuracy: 1F/C and 2% to 3% RH) The smiley face symbol provides a quick and clear visual representation of the indoor comfort level, helping you assess the environment and take action against allergies, colds, and more for your family and your baby. (The smiley face appears when the temperature is between 20.0C and 26.1C /68.0F to 79.0F, humidity is between 30% and 70%.) The 2.2-inch larger LCD screen with bigger digits, Clearly displays temperature, and humidity, making it easy for users of all ages to read. Mounting Options: 1. Standing 2.Wall-Mount (no interference from wall temperature) 3.Magnetic Back online support is always ready to assist with any inquiries. Please shop with confidence! See pictures for more item details. Trusted Seller-Fast Ship!