A kosher alarm clock is a clock designed to be used on Shabbat and other Jewish holidays, when the use of electronic devices is prohibited. These clocks have special features that allow them to be used without violating Jewish law. Some of the features of a kosher alarm clock include:

• Shabbos Mode: This mode disables the ability to turn off the alarm by pressing a button, which is prohibited on Shabbat. Instead, the alarm must be turned off by other means, such as shaking the clock or moving a lever.

• Weekday Mode: This mode allows the clock to be used normally on weekdays, with the ability to turn off the alarm by pressing a button.

• Travel Mode: This mode is designed for use when traveling, and allows the clock to be used in different time zones.

Kosher alarm clocks are produced by several companies, including Kosher Innovations, and are available for purchase on websites such as Amazon and Eichlers.