【Indoor and Outdoor Monitoring】- The product measures indoor and outdoor temperature and humidity values in real time, providing daily health care assistance for you and your family. It meets your daily demand for ambient temperature and humidity. 【Strong Wireless Signal】- Connected with a wireless transmitter that features strong wireless signal penetration (433 MHz frequency). Long transmission distance (30-100m / 98-328ft in open air), the signal can be received quickly and quickly within the transmission range. 【Large LCD Display for Easy and Clear Readings】- Indoor temperature (0 - 60℃), outdoor temperature (-40 - 60℃), Humidity (10% -99%). The accuracy of temperature and humidity can reach ±1°C / ±5%. Automatically refresh data every 60 seconds (allows the sensor to stabilize for about 30 minutes). 【Portable & Convenient & Intimate Service】- Powered by 2 * AAA batteries (transmitter/receiver, not included). It is widely applied to baby room, bedroom, home, nursery, hatchery