Basic alarm clock & battery operated clock - This clock is powered by 4 x AA alkaline batteries only (not included), which can keep Constantly Big 1.2'' LED digit time display for more than 12 months.

With options for light and heavy sleepers, the best alarm clocks help you wake up on-time and ready to face the day.

[Brad] was asked by his Sister to design a motion-based alarm that would help her catch ... that is only active at night and can be battery-powered. What he came up with is a light-sensitive ...

It’s an easy basic battery operated alarm clock, run by 1 AA battery (not included), easy for elderly and kids.