hito Waterproof Shower Clock Timer Alarm Date Indoor Temperature for Bathroom Kitchen Cooking Bedroom Kids Pool Sauna (Blue) WATERPROOF AND BATTERY OPERATED: Waterproof shower clock works with one CR2032 battery (included). Clock size: 5.3x 4.0 inch. LCD display: 1.8x 1.0 inch. 2-IN-1: Clock and Timer. Timer count up to and from 99M:59S. Short-cut buttons in 1Min, 3Min, 5Min, 10Min. DATE AND INDOOR TEMPERATURE: hito bathroom clock timer also displays date and indoor temperature (Fahrenheit/ Celsius). VERSATILE: shower alarm for kids, kitchen cooking timer for mom, bedroom alarm clock, pool timer and sauna timer, etc. WATER RESISTANT (IPX7): Please do NOT immerse the unit in water. NOTICE: After months of use, when you find the clock resets itself or LCD goes blank when alarm starts going off, please clean the battery compartment with dry clean cloth and change the battery.