Wireless sensor measures outdoor temperature and features a corded waterproof probe to measure soil or water temperature. Information is sent to receiver, which monitors indoor temperature and humidity, records min/max humidity and temperature, and displays 12/24-hour time. 14.1°F–139.8°F indoor temperature range -39.8°F–139.8°F outdoor temperature range Sensor transmits up to 330 feet Sensor requires two AAA batteries, receiver requires two AA batteries (not included)