ToySplash makes pool care and maintenance easier than ever with this wireless digital pool themometer that displays outdoor air and water temperatures in the pool, spa and pond. It records and displays daily maximum and minimum temperatures and has large easy-to-read numbers with a backlight. This is a great product for all the ToySplash families whose kids can't wait to start swim season; no more arguing about whether it is really too cold to go out and no more dipping your arm in chilly pool water to find your thermometer! This convenient thermometer features an alarm for time and temperature change as well as a humidity display and moon phase calender. The receiver is free standing or wall mountable (hardware not included). The floating pool thermometer is water, chemical and UV resistant. Requires 2 AAA and 2 AA batteries (included).