Celebrate King's Day with TNW 🎟 Use code GEZELLIG40 on your Business, Investor and Startup passes today! This offer ends on April 29 →

All Articles for

Alarm Clock

An alarm clock is a clock that is designed to wake a person at a specific time. The primary use of these clocks is to awaken people from their night's sleep or short naps; they are sometimes used for other reminders as well. Some use sound, some use light, and some use sensors to identify when a person is in a light stage of sleep, in order to avoid waking someone when they're deeply asleep, which causes tiredness, even if the person has had adequate sleep.