The Weather Station Keychain facilities continue foresee with moon phases, temp as well as humidity, warning time with fall asleep function, monthly calendar with date, day as well as year display, min/max temp as well as steam memory, built-in compass as well as LED flashlight. Measuring 3.5-inch x 1.5-inch x .75-inch, a tool needs 2 symbol dungeon batteries (included). $24.99 is all we need to move home this Weather Station Keychain. [Amazon]