The sensor displays the temperature and humidity readings, pairing exclusively with the Gro1 Wireless Weather Station (part # 301005), it has a range of up to 165 feet. A maximum of 3 sensors may be paired. The sensor displays the temperature and humidity readings, pairing exclusively with the Gro1 Wireless Weather Station (part # 301005), it has a range of up to 165 feet. A maximum of 3 sensors may be paired per station.