Glass Front Clocks - Clear digits and calibrations are well printed on the clock, easy-to-read analog alarm clock. Loud Melody Alarm - Alarm starts and stays at loud, good helper for those kids/teens who has trouble waking up and heavy sleeper. Simple to Use Quartz Alarm Clock - Quartz movement ensures time accuracy, requires AA Cell (Not Included), without thinking about power goes out and wires. size 13x19 cm