AcuRite Wireless Indoor Outdoor Temperature and Humidity Sensor (06002M) , white
Brand: AcuRite
Color: White
Remote sensor reaches up to 330 feet (100 meters) using 433 MHz wireless signal and transmit data every 16 seconds
Connects with compatible AcuRite weather stations through the AcuRite Access (sold separately)
Requires 2 AA alkaline or lithium batteries (not included)
Company Based in Lake Geneva, WI, USA - Since 1943
Only compatible with AcuRite Access and certain weather stations. See below for a list of model numbers