Feature 1、Multiple Functions: Digital hygrometer has multiple uses, it is not only a thermometer, a hygrometer, but also a projection alarm clock and a weather clock, which is highly practical. 2、60m Data Transmission: Indoor outdoor thermometer 60 meters long distance data transmission, can be hung, can be placed upright. 3、Temperature Prediction: The digital room thermometer predicts temperature, automatically changing from indoor temperature to outdoor temperature. 4、Projection Function: The alarm clock is projected on the wall in a soft red color with a very clear view, but it won't disturb you or your child's sleep. 5、Multiple Languages Display : The indoor outdoor hygrometer includes a display in 7 languages and is easy to use, just install the battery. Item Type: Indoor Outdoor Thermometer Material: Plastic Host Battery Parameters: 1 x CR2032 Button Battery (Not Included) Receiver Battery Parameters: 2 x AA Batteries (Not Included) Projection Function: Support Simultaneous Projection of "Time and Temperature" There is a Switch to Choose Continuous Projection or Turn off Projection: Support "Indoor Temperature + Time" and "Outdoor Temperature + Time" Alternately Display: Support Dual Alarm Function: Choose from "Monday to Friday", "on Weekends" or "7 Days a Week" Weather Forecast Function for the Future 8 Hours: Support Indoor Climate Comfort Display: Support Indoor Heat Index Numerical Display: Support Outdoor Dew Point Temperature Display: Support 3 Levels of Indoor/outdoor Mold Risk Reminder: Support Temperature Check: Indoor Measurement Range: -9.9℃～50℃ (15℉～122℉) Outdoor Measurement Range: -20℃～+60℃ (-4℉～140℉) Humidity Detection: Indoor/outdoor Measurement Range: 20%RH～95%RH Weight: Approx. 478g / 16.9oz Package List 1 x Indoor Outdoor Thermometer1 x Receiver 1 x Power Adapter 1 x User Manual Note Host and receiver are shipped without batteries.