AcuRite 06004RM 5-in-1 Weather Sensor with Rain Gauge, Wind Speed, Wind Direction, Temperature and Humidity High-precision 5-in-1 wireless weather sensor accurately measures the temperature, humidity, wind speed, wind direction and rain Sensor data is transmitted every 36 seconds using 433 MHz wireless signal up to 330 foot (100 meter) range Requires 4 AA alkaline or lithium batteries (Batteries not included) Compatible with any AcuRite 5-in-1 weather station display (sold separately; full list below)