T Tocas( TM) Jumbo Numbers 44cm LED Digital Wall-on Clocks with Thermometer, Calendar, Snooze, Alarm, Countdown, Blue LED Display Constant lighting, fits anywhere, especially,stadium, library, school ect. Whatever indoor or outdoor.(not waterproof) Function:Led Clock,Thermometer,Calendar,Alarm,Snooze,Remote Control LED Digital Wall Clock ,18-inch /44*15*2cm LED Dot matrix Technology,More stable and Reliable Power by AC adapter and button cell(CR2032) backup